Exchange networks and states, c. 1200–1450

Exchange networks and states, c. 1200–1450

How did expanding networks spread both opportunity and danger?

Context and mechanism

Around 1200–1450, Silk Road, Indian Ocean and trans-Saharan networks connected many societies through different environments and technologies. Monsoon navigation, caravan transport and commercial institutions shaped routes. Merchants, states and local producers all influenced exchange; no route operated independently of labor and political conditions.

Mongol expansion changed relationships across Eurasia through conquest and imperial connections. Expanded contact could support commerce and movement while warfare and disease caused destruction. The spread of plague shows why connection cannot be judged solely by trade volume.

Mali and other African states participated in networks linking gold, salt, scholarship and political authority. In East and Southeast Asia, production and maritime trade interacted with powerful states and port communities. The Americas developed extensive networks independently. Compare mechanisms and scales rather than claiming all exchanges formed one seamless world market.

Work through the evidence

Fictional route A moves 20 loads at cost 5 each; route B moves 10 at cost 12 each. Total costs are 100 and 120. Route A is cheaper in this model, but the comparison omits seasonality, danger, coercion and cargo value. A line on a map cannot supply those missing variables.

Your investigation

Annotate a route comparison with goods, ideas, disease and political power. Calculate modeled costs and identify why lower transport cost alone cannot establish overall benefit.

Sources and their limits

Route ledger

A: 20 loads × 5 cost units. B: 10 loads × 12.

Fictional figures with equal-sized loads; not actual medieval prices.

Trans-Saharan trade, guide

African gold production and trans-Saharan exchange connected multiple regions and political centers.

Authored summary; a synthesis differs from the travel accounts and objects it interprets.

Consult the source collection or original. Original LearnAI teaching text; not a quotation. External originals retain their own rights.

Extend and revise

High school: Trace one object and one noncommercial consequence.

AP practice: Compare networks and state-building within c.1200–1450 using causal reasoning.

Introductory college: Critique a network map’s scale and build a bibliography including material and written evidence.

How would your map change if it followed labor instead of luxury goods?

Port investigation: who makes a network work?

Try and predict

Imagine an unfamiliar merchant arriving with goods but without local contacts. Write two problems that a port intermediary might help solve, and one way that dependence on that intermediary could create unequal power. These are hypotheses to test, not facts established by the scenario.

Read the three added cards in the source workbench: Mogadishu: hosts and merchant transactions, Kilwa: a merchant reports a gold connection, and Kilwa: surviving buildings and imported materials. Record your initial interpretation in each card’s saved annotation before opening the comparison below. Existing ledger practice remains a separate, fictional arithmetic exercise.

Experiment: build three evidence chains

A port is a community of people and institutions, not simply a dot where arrows meet. Draw the following three chains on paper or describe them in your saved notes. An arrow here means information passing between people or representations; it does not show a shipping route.

For each chain, mark the link you can inspect in this packet and a link you would need to investigate elsewhere. Source type and source reliability are different questions: a primary text may contain hearsay; a secondary study may carefully compare independent evidence.

The Fordham selection of Ibn Battuta’s narrative identifies Gibb’s 1929 translation and edition. Distinguish the medieval experiences, later narration, translation and present web presentation. An English word chosen by a translator is not automatically the narrator’s original wording.

Repair four claims

Before revealing the comparison, rewrite each statement with a source attribution, a defensible inference and one remaining uncertainty. Save the most important repair in the corresponding card’s note.

1. “Local intermediaries were irrelevant to maritime exchange.”
2. “This travel passage proves that every merchant benefited equally.”
3. “The narrator personally followed the gold shipment inland.”
4. “An imported object proves a direct voyage between its place of manufacture and its findspot.”

Compare the four claim repairs

1. The host card supports investigating intermediaries as participants in exchange. To test their importance, seek transaction records or other independent accounts; do not turn one description into a rule for every port.
2. A favorable judgment is evidence of the narrator’s perspective. Equal benefit would require a defined comparison and evidence about different participants, including those absent from his account.
3. Retain the merchant informant in your attribution. Reported information can be useful without becoming an observed itinerary. Seek independent evidence before drawing a particular shipment’s path.
4. Material can pass through several owners and ports. Investigate find context, dating and possible redistribution before proposing a route. A manufacturing location and a findspot alone do not identify every intervening journey.

These are worked reasoning examples. Reading them does not constitute independently demonstrated understanding.

Understand: connection, agency and uncertainty

Use the cards to distinguish a mechanism from an outcome. An intermediary could supply contacts or help negotiate unfamiliar practices; those are possible explanations to investigate. Neither the mechanism nor a narrator’s approval measures prices, bargaining power or welfare for everyone involved. Ask whose labor and experience your account still omits.

The UNESCO description of Kilwa combines architectural, archaeological and documentary interpretation. Treat it as an entry point for investigating material evidence. Its broad historical account does not supply a complete object catalogue. Identify the particular dated building or find context needed for your claim instead of treating all remains as contemporary.

Apply: an unfamiliar fictional find

A fictional museum label says: “Bowl manufactured in region X, found at port Y; find layer unrecorded.” No ship log, owner or intermediate port is identified. Write a two-sentence exhibit label and a request for further evidence. Preserve the manufacturing attribution as the label’s claim; do not invent a date of arrival, named carrier or uninterrupted voyage. Explain why the missing find context matters.

High school: submit the three chains and two claim repairs in your notes, then explain the fictional find to a partner who has not read the packet.

AP practice: use one textual and one material-evidence interpretation to explain how networks depended on local institutions. Qualify the inference and identify a missing perspective. This case supports sourcing and argument practice; it is not a complete AP Indian Ocean topic or exam assessment.

Introductory college: locate a dated excavation publication or object catalogue and compare its specific evidence with the heritage summary. State whether you actually inspected the original record. Explain how its context changes your proposed route or chronology.

Continue by comparing this maritime case with the trans-Saharan guide above. Name evidence you would need to test the same intermediary hypothesis in a different network; do not assume the two systems worked identically.

Quanzhou: from visiting merchants to a resident community

Try: what would residence leave behind?

A visiting ship, an imported bowl and a maintained place of worship are different kinds of evidence. Rank them for the question “Did people organize continuing community life here?” Explain your ranking before reading the case. Consider dating and context, not just how impressive an object looks. A building can be reused, while a visiting trader can stay for years; no object type answers every question by itself.

Quanzhou lies on China’s southeastern coast. UNESCO’s heritage account places its maritime development in the Song–Yuan period, the tenth through fourteenth centuries, and connects religious, administrative, transport and production remains. Our narrower case concerns Tamil-speaking South Indian connections in the late thirteenth century. Diaspora here means a community living away from a place of origin while maintaining connections with it; it does not mean that everyone shared one occupation, belief or experience.

Predict: identify the necessary connection

Write a hypothesis connecting maritime exchange to the maintenance of community institutions. Include at least one local participant or resource. Then predict what evidence could distinguish an institution sustained by residents from a monument left by a visiting diplomatic mission. Keep this question in mind when comparing the later Galle encounter.

Experiment: read a claim and its interpretation separately

Source A — edited primary inscription. In their 2009 inscription collection, no. 15, pp. 287–288, Noboru Karashima and Y. Subbarayalu date the Quanzhou Tamil inscription to Saka 1203, approximately 1281 CE. Their translation records Sambandapperumal’s installation of a Siva image and refers to permission from a Mongol ruler. Its phrase “in accordance with the firman (written permission)” records a claim of authorization; this packet does not contain the separate permission document. A firman is an authoritative written order or permission in this context.

Source B — a scholar’s material interpretation. In the publicly available introduction to Risha Lee’s 2009 chapter, South Indian-style carvings made largely from locally available granite support her interpretation of a settled community. She examines patrons and local artisans as participants in cultural translation. This is an argument from material evidence, not a surviving interview with every craftsperson; only the public introductory section is supplied here.

Make two columns titled recorded statement and historian’s inference. Place the installation, authorization claim, local material and settled-community interpretation in the appropriate column, noting where a modern editor mediates access to the evidence. Do not collapse the source and the interpretation into “the stone says merchants lived here.”

Patrons and continuing practice

What purpose is recorded? What evidence would show repeated support rather than a single dedication?

Materials and makers

How might a familiar design be realized with local stone, skills and building conditions?

Authority and access

Who claims permission? What separate evidence would show how the permission operated?

Draw an arrow in each direction between two boxes. Label one with evidence supplied here and the other with a question still to investigate. The boxes describe relationships, not three uniform ethnic groups. A patron could have several identities, and a stone’s origin does not identify a worker’s birthplace.

Understand: adaptation is a relationship

A continuing institution requires more than transporting a finished object. People obtain resources, organize work and negotiate use of space. Familiar practices can be maintained while their material form changes in a new setting. Conversely, local makers and surroundings can incorporate unfamiliar commissions. Reciprocal adaptation means examining changes and accommodations among interacting participants; it does not require that the changes were equal, voluntary in every respect or accepted by everyone.

The two sources provide a bounded way to investigate such relationships. They do not identify every builder, enumerate a resident population or prove a particular merchant guild founded the institution. A religious installation and commercial networks can be connected without assuming all worshippers were traders or all traders shared that religion. State which additional account, dated donation, building phase or transaction record would test your explanation.

Repair a misleading label

An invented museum label reads: “Both scripts on this stone tell exactly the same story, so two independent sources prove every foreign merchant had equal rights.” Repair all three errors.

The editors of Source A note Chinese characters below the Tamil text but question whether the Chinese inscription relates to it. Source B’s introduction calls the inscription bilingual. “Two languages appear” and “one text translates the other” are different propositions. Do not resolve the difference by counting websites. Identify the separate readings needed to decide it.

Review the repaired label and adaptation argument

A defensible label attributes the Tamil installation and authorization claim to the edited text. It notes the relationship between the scripts as a question requiring comparison of their contents. Two scripts on one object are not automatically independent corroboration, and a permission claim for one installation does not establish general equal rights.

The material interpretation can support an argument about maintaining practices through local resources and collaboration. It cannot tell us the private identity of every participant. A stronger account connects a specific textual claim to a specific material observation, then states how a missing record could change the conclusion. It avoids the opposite overstatement that uncertain details make all evidence useless.

Apply: change the evidence, preserve the first argument

In a fictional archive, a donation record names people supporting a hall over twenty years. A later account says some donors were visiting merchants. A contractor’s receipt records stone purchased nearby but does not name the workers’ origins.

Write a short response to “Does this prove a resident community copied its original building unchanged?” Then revise after learning that the hall served both residents and seasonal visitors. Identify what becomes more specific, what remains plausible and what must be withdrawn. Retain both versions in your notebook or existing source notes.

Compare a changed-evidence response

Repeated donations support continuity of an institution, but a donor list is not a residence register. The later information permits a mixed user community; it does not erase the hall’s continuing support. Local stone establishes a material purchase, not unchanged design or workers’ identities. A revised argument would distinguish the institution’s durability from the residence of each donor and seek evidence about use, building plans and labor arrangements. The initial all-resident, unchanged-copy claim should be withdrawn.

High school: keep the two-column evidence table and repaired label. AP practice: explain one way continuing maritime contact could shape both community institutions and a host city’s built environment, using the dated case and qualifying what remains unknown. Introductory college: compare the published readings and their apparatus before defending a claim about the scripts; record any edition you could not inspect. These are public teaching tasks, not an independent assessment or a claim that the entire community history is supplied.

Continue: compare residence with an official visit

Compare the 1281 Quanzhou case with the early-fifteenth-century Galle inscription. What evidence concerns sustaining an institution, and what concerns an official mission’s message? Neither case should stand in for the other. Bring the comparison to the network argument workshop, with one claim that each source can support and one it cannot.

What can a surviving ship tell us about trade?

Try: recover a journey from objects

A ship contains imported goods when it sinks in a harbor. Sketch two possible earlier journeys: a direct voyage from the goods’ producing region and a voyage through an intermediate market. Both can leave similar cargo. Name a record that could distinguish them.

The earlier Quanzhou community case investigated residents and patronage. Here the evidence concerns a vessel and its cargo. A port can connect local institutions with distant exchange, but objects from the same port do not automatically belong to the same people or voyage.

Predict: what does a partition prove?

A bulkhead is a partition across a ship’s interior. Predict two possible functions: organizing cargo and contributing to the hull’s structure. Does observing a partition also establish that it prevented water from passing between compartments? Write the additional feature you would inspect before accepting that claim.

Experiment: separate remains from reconstruction

Archaeologist Michael Flecker’s 2015 survey, printed page 32 places the Quanzhou wreck in the thirteenth century, describing surviving hull remains 24 metres long and 9 metres wide, twelve bulkheads attached with metal brackets and frames, and layered hull planking. He reports cargo including fragrant wood and cowrie shells and interprets the ship as returning from Southeast Asia. These are short paraphrases of a modern archaeological synthesis, not an original captain’s log or a complete excavation report.

Copy this evidence board. For each panel, write a supported sentence and a question that remains open.

Construction

Hull planking → fastenings → crosswise partitions

Describe how parts are connected. Do the reported remains establish how well they excluded water?

Cargo

Recovered goods → possible production and exchange regions

Distinguish where a good originated from every port where it changed hands.

Voyage

Harbor find → interpreted return journey

Ask what supports the direction of travel and what would locate intermediate stops.

Now inspect the survey’s discussion on printed page 30. Flecker questions general claims of watertight compartments because archaeological examples have limber holes, openings at the bases of partitions through which water can pass. This is a broader construction argument; the short Quanzhou entry does not give a hole-by-hole plan of this wreck. Mark that distinction on your board.

Review construction, cargo and voyage claims

Fastenings and partitions support a description of construction. Cargo supports investigation of exchange connections; it does not give a complete itinerary. The return journey is the archaeologist’s interpretation of the remains and cargo. The discussion of limber holes identifies a feature to check before labeling a particular compartment watertight. It does not establish that every partition on every vessel leaked, or that shipbuilders could never close an opening.

Understand: scale changes the question

A hull is the main body of a ship. Surviving hull dimensions describe what remains; they are not automatically its original overall dimensions or carrying capacity. Dividing length by width would give a ratio, not a cargo weight. To estimate capacity, a historian would need more information about the vessel’s shape and loading.

Similarly, one cargo demonstrates a particular connection. To establish that trade grew, compare dated evidence from more than one period with attention to preservation and recovery. More discovered wrecks can reflect more searching as well as more voyages. This South China Sea case supplies a concrete regional comparison for wider maritime networks; it does not document a voyage across the Indian Ocean.

Apply: repair an exhibit label

Revise this proposed label in three sentences: “The complete 24-metre ship had waterproof rooms. Its cargo proves a nonstop voyage from one foreign port. Its discovery proves that all maritime trade doubled.” Use one construction fact, one qualified exchange inference and one clearly stated evidence need.

Then test your reasoning against an invented archive, unrelated to the historical wreck: a cargo list records six bundles loaded at Port A; a receipt records two more at Port B; the ship arrives at Port C. Draw the documented A → B → C sequence. Eight bundles arrived if none were lost or unloaded. Explain why eight arrivals do not establish eight bundles produced at A, and what would change if the receipt belonged to another ship.

Review the revised label and changed archive

A defensible label describes surviving dimensions and attached bulkheads, attributes the Southeast Asian return interpretation to the survey, and asks for construction details and comparative voyage evidence before claiming waterproof performance or growth. In the invented archive, six plus two gives eight loaded bundles under the stated assumptions; loading location is not production location. A mismatched receipt removes evidence for this ship’s stop at B and its additional two bundles. Keep a proposed route separate from a documented route.

Continue: choose the next evidence

High school: annotate the three panels with one supported statement each. AP practice: compare what this vessel and the travel narratives reveal about a maritime connection; explain their different geographic scope. Introductory college: propose a dated sample of ships or port records that could test changing trade volume, including a way to examine recovery bias. These public practice tasks do not independently certify mastery.

Ming maritime encounters: what can a multilingual monument establish?

Try: separate a message from its reception

A ruler sends envoys with gifts and a monument addressed to several audiences. Before reading further, predict what the monument could tell us about the mission. Then name a different record needed to discover how local people responded. A message can survive even when the responses to it do not.

Locate the case in time and space

Zheng He’s Ming-sponsored expeditions took place during 1405–1433, connecting Chinese ports with Southeast Asia and the Indian Ocean. The Columbia teaching overview places Sri Lanka within these journeys. These were official missions in an already connected maritime world; this date range is not the beginning or end of Indian Ocean exchange.

Our case is a stone inscription associated with Zheng He, catalogued as the Galle trilingual stele. A stele is an inscribed upright stone. Galle is on Sri Lanka’s southern coast. The Siddham object record OB03125 links separate Tamil, Persian and Chinese inscription records. We are using a modern scholarly catalogue of a historical object, not claiming to have read its original scripts.

The Tamil record IN03150 reports a date in the seventh year of Yongle, conventionally 1409, and describes offerings sent by the Chinese emperor through envoys to Tenavarai-nāyanār. It reports discovery in 1911 in a culvert at Galle and later transfer to Colombo Museum. Its account of the 1933 edition says the Tamil reading benefited from the earlier Chinese translation. These are different stages in the source’s history, not three dates for one event.

The Persian record IN03151 describes substantial damage and a translation of the legible portion. Missing text limits what can be compared. Do not silently reconstruct it from another language or treat three catalogue pages as three independently produced witnesses.

Predict: what would change your conclusion?

Choose the stronger starting claim and explain why:

1. The object invites investigation of how Ming envoys addressed different audiences.
2. Every resident of the port accepted Ming authority and benefited equally from the visits.

List the additional observations needed to support the second claim. Separate evidence about officials, merchants and other residents instead of treating “the port” as one person.

Experiment: build an evidence chain

Commission and message: a named ruler and envoys → a text that records offerings.

Encounter: delivery, display and interpretation → evidence about who could see or hear the message.

Response: acceptance, negotiation, objection or indifference → independently attributable local evidence.

These arrows are an analytical framework, not a reconstructed itinerary. Copy the chain. Place each item below at a step, and mark whether it supplies evidence or identifies an evidence gap:

• The catalogue attributes a text about offerings to the imperial mission.
• The record identifies multiple languages on one object.
• We have no supplied receiving receipt, audience list or resident’s account of this object.
• The stone was discovered centuries later in a reused setting.

Now make a three-row chronology: inscription date, discovery, modern edition. Write what each date establishes. Does the 1911 findspot by itself locate the original display? Does the inscription date by itself prove when a gift arrived?

Review the evidence chain and chronology

The attributed offering text is evidence of what the mission recorded. Multiple languages support a question about intended communication; they do not count the audience or measure its agreement. An absent receiving record leaves delivery and response incompletely evidenced in this packet. The later discovery establishes a reported recovery context, not an untouched original display.

The dated inscription, twentieth-century discovery and published reading belong to different moments. A defensible explanation preserves that sequence and requests evidence connecting it. It does not replace a missing connection with a confident arrow. An inscription can be valuable evidence even when those limits remain.

Understand: diplomatic representation and local agency

An official maritime mission can combine communication, exchange and assertions of authority. An offering can help present a ruler or establish a relationship without proving that every recipient accepted the same political meaning. Different audiences can interpret one act differently. The source question is therefore not simply whether the voyage “connected” places, but how participants represented that connection and what other evidence can test their representations.

Keep intended audience, actual audience and response separate. Language choice is relevant to the first question, but cannot settle the other two. Likewise, gifts recorded in a monumental text are not an audited cargo total, a measure of trade growth or a survey of religious practice. A multilingual object does not by itself establish a resident merchant community, equal treatment or harmonious relations across the whole region.

Compare this case with the earlier Mogadishu host account. Which source describes a transaction arrangement, and which records a mission’s representation? Explain how that difference changes the claim each can support. Do not rank a stone above a narrative merely because it is material: attribution, context and the specific question still matter.

Apply: revise after a changed record

Use this fictional archive exercise, not additional evidence about Galle. A monument says a ruler sent twelve ceremonial gifts. A newly supplied receiving list records nine objects at one storehouse, with three objects’ destinations unspecified. A later visitor reports that a public ceremony occurred but gives no attendance list.

Write an initial two-sentence interpretation, then revise it after reading all three records. Address four questions: What was claimed? What was recorded as received? Which discrepancy remains unresolved? What do we know about public response? Do not infer theft, rejection or unanimous acceptance from the missing information.

Compare a defensible revision

The monument claims twelve gifts were sent; the receiving list documents nine objects at the named storehouse. The records do not yet explain the other three destinations, and their categories might need comparison before assuming a shortfall. The visitor’s report supports investigating a ceremony, but does not establish who attended or what they thought. Further dated transport or receiving records could resolve part of the discrepancy; accounts from participants could address reception. Neither request guarantees that such records survive.

A different defensible response may emphasize the uncertainty in matching objects across records. It must still attribute each statement, preserve the nine/twelve distinction and avoid inventing an explanation for the three unspecified destinations.

High school: retain the evidence chain, three-date chronology and revised archive label in your notebook or existing source notes. AP practice: explain how an official maritime encounter could shape cross-cultural interaction using this dated case and a precise source limitation. Introductory college: compare the catalogue with an inspected edition, transcription or independently produced regional source; distinguish a translation dependency from corroboration. If you cannot access the underlying edition, state that limit rather than claiming to have verified it.

Continue: compare encounters without erasing differences

Return to the port intermediary investigation or the comparative argument workshop. Choose evidence for a similarity and a difference between official diplomacy and a merchant transaction. This is guided public practice. It does not complete the Ming maritime sequence, by itself establish a resident diaspora case or certify independent historical understanding.

Mongol states: conquest, succession and regional rule

Try: what would count as political unity?

Before reading, define what evidence would show that two territories obeyed the same ruler. Is a shared ruling family enough? Would trade between them prove it? Keep these as questions while separating military expansion, administration and relations among rulers.

Reconstruct the sequence

These dated summaries draw on modern institutional interpretations. They are not contemporary proclamations. Copy them onto a timeline, then label each entry formation, expansion, succession, administration, or regional breakdown. More than one label may be justified.

Date or period	Evidence anchor	Question for your explanation
1206	An assembly recognized Temujin as Chinggis Khan after unification. Columbia: unity	How could personal allegiance help build a larger political organization?
1227; 1229–1241	Chinggis died in 1227; Ögödei’s reign followed in 1229–1241. Conquests continued under successors. Columbia: succession and expansion	Why is the founder’s death different from an immediate end to expansion?
1234	Mongol forces destroyed the Jin dynasty in northern China. Columbia: expansion	Does defeating a dynasty demonstrate how every conquered community was governed?
1258	Hülegü’s forces captured Baghdad. Columbia: regional divisions	How does conquest help explain a new regional center of power?
Around 1260 and afterward	Succession struggles and regional rivalries accompanied fragmentation. Columbia: divisions	Why should political fragmentation be treated as a process rather than one border appearing everywhere at once?
Yuan period, 1271–1368	Yuan rulers adapted Chinese institutions; later court conflict, corruption and calamities contributed to rebellion. Met: Yuan dynasty	Why does an account of Yuan decline not establish the same ending for every Mongol domain?

Draw two arrows between entries. For each, write a causal explanation and identify what additional evidence would test it. Earlier timing alone does not prove that one event caused the next.

Compare regional rule

The four labels below orient your investigation; they do not show fixed borders or identical political arrangements. Columbia’s regional account distinguishes these domains and discusses conflict over routes and grazing between the Golden Horde and Ilkhanids.

Yuan: East Asian center of rule under Khubilai and successors.

Chagatai domains: Central Asian setting.

Ilkhanids: Iran and adjoining West Asian territories.

Golden Horde: western steppe and Rus' connections.

A khanate is a realm ruled by a khan. Naming one does not specify whether authority was direct, negotiated or exercised through local rulers. A shared dynasty and continued exchange can coexist with conflict among regional governments.

For a concrete administrative mechanism, Columbia’s Khubilai account describes retention of the Six Ministries and Secretariat. Compare that institutional continuity with the change in rulers. Do not equate familiar offices with equal access to power: the Met’s Yuan interpretation also discusses discrimination against southern Chinese scholars.

Repair an explanation

Rewrite this claim in three sentences: “The empire immediately disappeared when Chinggis died; later trade proves it remained one peaceful state anyway.” Use at least two dates, distinguish the meanings of “empire,” and state one question the supplied evidence cannot answer.

Review the political-sequence explanation

Continued conquests under successors contradict an immediate end at the founder’s death. Later regional divisions concern the distribution of political authority; exchange by itself cannot demonstrate obedience to one ruler. A defensible explanation separates expansion, regional autonomy and the histories of individual dynasties. It also asks how conflict affected particular routes instead of treating every connection as continuous or equally secure.

The two parts of the original claim fail for different reasons. One collapses a sequence into a single death; the other substitutes evidence of connection for evidence of political unity. Correcting either requires more than replacing one date.

Apply: an unfamiliar archive

In a fictional packet, two neighboring rulers issue separate tax orders, exchange gifts, and dispute a frontier. Choose which records bear on administration, diplomacy and conflict. Explain why gift exchange alone does not settle whether one ruler was subordinate. Request one further record that could distinguish alliance from subordination, and say what finding would change your conclusion.

High school: submit the labeled timeline and repaired explanation. AP practice: explain a change in political organization using the chronology and one administrative mechanism. Introductory college: compare a regional chronicle or administrative document with these modern summaries; document its date, jurisdiction and transmission. This overview supplies a political framework, while deeper conquest histories, regional institutions and independent assessment remain necessary.

Continue to the travel-pass and Rubruck cases. Date each source against the sequence and explain which political setting it can illuminate. Do not use a later Yuan object as direct evidence for every earlier conquest or every regional government.

How did an envoy's knowledge become part of a history?

Try: a connection needs a mechanism

Two books describe the same distant place. Does that prove one author traveled there, that one copied the other, or that both used an intermediary? Write two possible information paths. For each, name evidence that could distinguish it from the alternative. A shared topic establishes a question about connection, not a complete travel route.

The earlier political sequence distinguishes Yuan rule in East Asia from the Ilkhanid court in Iran. Political connections between these domains could move officials and information without making them one uniform government. Here we investigate a named intermediary and a court-supported history rather than assuming that all knowledge circulated freely.

Predict: who shapes the account?

A ruler commissions a history, an envoy provides information, and a workshop produces illustrated copies. Predict where selection, interpretation or omission could occur. Circle one decision that a ruler, an informant, a compiler and a copyist might each influence. These roles can overlap; do not assume that one person performed every task or that every contributor had equal authority.

Experiment: connect three kinds of evidence

An intermediary. Bertold Spuler’s specialist article on Bolod—also written Bolad—identifies him as Qubilai’s representative at the Ilkhanid court and a supplier of information on early Mongol and Iranian affairs to Rashid al-Din. The article locates his diplomatic activity in the 1280s. This is a modern historical synthesis with references, not a transcript of their conversations.

A difficult journey. The public opening of Thomas Allsen’s 2001 chapter discusses Bolad’s embassy with his companion Isa, using Chinese biographical evidence. Its translated account describes their separation during conflict on the return journey and Isa’s later report. That gives a concrete qualification to any claim that connections between Mongol courts guaranteed uninterrupted movement. The full chapter and underlying Chinese biographies are not supplied here.

A surviving book. The Khalili catalogue for MSS 727 identifies a Tabriz copy of the Compendium of Chronicles, dated 714 AH / 1314–15 CE. It connects the work’s changing scope to commissions by Ghazan and his successor Öljeytü. The catalogue lists Chinese dynastic illustrations as well as histories of other peoples. This dated copy is evidence of production, not an eyewitness record of every earlier event it depicts.

Copy the diagram below and write supported relationship, possible relationship, or missing evidence beside each arrow. Use the three source descriptions to justify your labels. An arrow can be supported at a broad level while the exact words transmitted remain unknown.

Information supplied

Bolad's knowledge → Rashid al-Din's compilation

Identify the modern source that supports this relationship.

Scope commissioned

Ilkhanid patrons → the history-writing project

Ask how a commission can shape what a work includes.

Work reproduced

Compilation and workshop → surviving dated copy

Separate a work's composition from this copy's production.

Now add one proposed arrow: Bolad → this particular Chinese illustration. Can the supplied evidence establish it? Identify the additional record needed to connect a named informant to a particular passage or image. Do not silently transfer a general contribution to every part of the manuscript.

Review the evidence map

The specialist synthesis supports Bolad’s information-supplying role. The manuscript catalogue supports patronage and the existence, place and date of a copy. Together these give a concrete mechanism involving people and institutions, but do not identify every stage for every passage. The proposed arrow to one illustration is not established: it would require a more specific source attribution, workshop record or closely supported textual and visual comparison.

The journey account also changes the causal claim. Court connections could create opportunities for contact while conflict disrupted particular journeys. “Facilitated exchange” should therefore name what was facilitated and for whom, rather than imply universal safety or equal access.

Understand: compilation is an active process

A compilation brings material together from different sources. Selection and arrangement can change how a reader understands those sources, even when the compiler aims to preserve them. A scriptorium is a workshop where manuscripts are copied; producing a book also requires materials, skilled labor and support. Moving an informant is therefore one stage of knowledge exchange, not the entire mechanism.

The catalogue distinguishes Arabic language from naskh script, a style of writing. A work’s language, a contributor’s place of origin, the location of a workshop and the subject of an image answer different questions. None alone establishes the identity or beliefs of every contributor. Information about China could be incorporated into a work made in Iran without every maker traveling to China.

Apply: correct a caption and test a new archive

An invented caption says: “This 1314–15 picture proves that its artist witnessed ancient Chinese rulers, that Bolad supplied every detail, and that Mongol rule made all travel safe.” Rewrite it in three sentences. Retain a positive, attributed claim about historical exchange; do not replace the caption with “nothing can be known.”

Then use this fictional changed-evidence packet, unrelated to MSS 727: a workshop account pays two copyists; an author’s preface names three informants; a newly found note attributes one chapter to an earlier written source. Explain which link your evidence map must change. Does the new note erase the informants’ roles in the rest of the work? Does paying two copyists identify the original author?

Compare the caption repair and changed-evidence response

A defensible caption dates the surviving copy and identifies its production context, then distinguishes the earlier people represented from the makers’ own time. It attributes Bolad’s documented contribution without claiming ownership of every image or passage. It recognizes an exchange mechanism while retaining the evidence of interrupted movement.

In the fictional packet, the new note adds a written-source relationship for one chapter. It does not demonstrate that the three informants contributed nothing elsewhere. Payment to copyists establishes a production role, not original authorship. A revised account can preserve several contributors while specifying which evidence supports each role. Seek chapter-specific comparison before extending one attribution to the entire book.

High school: retain the labeled diagram and corrected caption. AP practice: explain one mechanism of cultural exchange tied to a Mongol political setting, using a named intermediary, an institution and a dated output. Introductory college: inspect a published primary passage and trace its editorial or translation history before connecting it to one part of the compilation. Record access limits; a bibliography entry is not proof that you inspected the cited work.

Continue: compare how evidence travels

Bring this case to the comparative argument workshop. Compare the movement of historical information with the movement of goods or the maintenance of a community institution. Identify what the two processes share and which evidence they require differently. These are guided public tasks; a complete account of Mongol cultural transmission and independently assessed historical reasoning remain further work.

Mongol communication: what could a travel pass accomplish?

Try: separate permission from arrival

A messenger presents a ruler’s credential at a stopping place. Predict what must happen next for a message to reach its destination. Include people, animals and supplies in your explanation. Then mark which steps a surviving credential could establish by itself.

Two sources, different jobs

The Metropolitan Museum’s catalogue of a paiza, object 1993.256, dates this iron-and-silver pass to late-thirteenth-century Yuan China. Its inscription uses Phakpa script, named for a Tibetan scholar at Khubilai’s court. The catalogue’s English translation includes “By the strength of Eternal Heaven, an edict of the Emperor [Khan].” The remaining inscription threatens consequences for disrespect. This is an object carrying a claim to authority, accessed through a modern catalogue and translation. It supplies no named itinerary or arrival record.

Open the catalogue image if available. Record one visible feature separately from one fact supplied by the catalogue. The text above provides the essential evidence if you cannot inspect the photograph. Do not claim to read the original script from its appearance.

In Adamjee and Carboni’s museum essay, Mongol governments employed existing local administrators, and relay stations supported mounted messengers. The authors distinguish Yuan, Chagatai, Golden Horde and Ilkhanid domains. They describe Hülegü’s conquest of Iran in 1256 and Baghdad in 1258. Conquest and administrative communication therefore belong in the same explanation; efficient delivery does not establish peaceful expansion or equal treatment. This secondary overview supplies institutional context, not station accounts for this particular pass.

Experiment: reconstruct a delivery chain

These arrows form a proposed mechanism to investigate, not a transcription of the inscription. Copy the chain and attach each source only where it supplies evidence. Circle the transitions that remain unverified. A recognized pass may still encounter exhausted animals, interrupted routes or refusal. Ask who bears the costs of supporting movement, rather than treating resources as free.

Now work with this fictional station packet, created for practice. Its names, quantities and dates are invented; it does not reconstruct Yuan regulations or medieval travel speeds.

Record	What it says
Credential entry, day 1	Bearer permitted to request two fresh mounts at each station.
Station A account, day 2	Two mounts issued to the bearer; no return recorded on this page.
Station B note, day 3	One mount available; request for another forwarded.
Destination register	The relevant page is missing.

1. Build a four-row evidence table: authorization, actual issue, interruption and arrival. Give the supporting record or write “not established.”
2. Explain why adding two authorized mounts and two issued mounts would double-count different stages of one request.
3. Identify what the station-B note changes in your initial prediction. Does it establish delay, complete failure, or an unresolved constraint? Distinguish a likely consequence from an observed one.
4. Choose the next record you would seek, and state exactly which uncertainty it could resolve.

Review the messenger investigation

The credential establishes the packet’s permission; A’s account records an issue. B’s note records a resource constraint and a response, but no departure time or final outcome. A missing destination page supplies neither proof of arrival nor proof of failure. Do not count authorized resources as additional resources already delivered. A dated acknowledgment could establish receipt, while station departure and arrival entries could help measure delay. Evidence of repayment or compulsory provision would be needed to investigate who absorbed the costs. None of these fictional records verifies the journey of the museum object.

Understand: institutions connect people unevenly

Your causal explanation should connect an authority claim with the officials and material resources needed to act on it. A pass could help coordinate recognition across distance, but recognition is not automatic enforcement. Compare this chain with the earlier port-host investigation: both require intermediaries; the evidence does not show that their authority, obligations or bargaining power were identical.

Apply: revise with unfamiliar evidence

A new fictional destination acknowledgment confirms receipt on day 7, but its bearer field is blank. Revise your conclusion in three sentences: what is now established, what remains uncertain about the carrier, and what the document still cannot establish about costs or safety. Then imagine a matching bearer name is found. Identify precisely which uncertainty changes; do not upgrade every claim at once.

High school: submit the chain and revised conclusion with one distinction between a source statement and your inference.

AP practice: write a dated argument explaining one mechanism by which Mongol rule could support exchange. Use the real object and institutional overview, acknowledge coercive expansion, and distinguish the fictional exercise from historical evidence. This is guided practice for Unit 2, not a complete Mongol-history assessment.

Introductory college: locate a published primary travel account or administrative record with an identifiable date, jurisdiction and edition. Compare its reported access to resources with the pass’s authority claim. Identify whether the account describes personal experience, reported practice or a rule, and explain the limits of generalizing across Mongol domains.

Continue by testing the same authorization/resource/outcome distinction in a different network. A comparative argument needs evidence for each setting, not simply the same arrows drawn twice.

A journey tests the mechanism: Rubruck, 1253

Locate the witness before using the evidence

William of Rubruck was a Franciscan traveling with a Christian missionary purpose. His account addresses Louis IX. The University of Washington’s Silk Road Seattle edition presents Rockhill’s 1900 translation of his 1253–1255 journey, with editorial notes and some alternative renderings from Jackson’s 1990 translation. The selections below are paraphrases, not quotations or independent station records.

Read the reported interruption

During his outward journey, Rubruck reports that a guide sent their animals back before securing replacements at a river crossing. The inhabitants said Batu had exempted them from duties other than ferrying travelers. Rubruck describes a three-day wait and eventual provision of animals, while his party walked. Later, he reports uneven access to replacement horses, including exhausted animals and changes of loads.

Find the river-crossing episode in the linked account by searching for “exempted.” Its scope differs from the later Yuan object: another date, setting and kind of evidence. No supplied source connects Rubruck with that particular pass.

Experiment: compare three explanations

Cover the feedback and construct a cause diagram using this sequence:

The diagram lists competing explanations to test. Some could operate together. For each arrow, mark supported by the account, plausible but unconfirmed, or contradicted, and explain your choice. A report of what someone said is evidence about an encounter; it is not the same as inspecting the order they invoked.

Build a comparison table with columns for claim, source, what the source can establish, and next evidence needed. Include the pass’s authority claim, the travel narrative and the earlier fictional station packet. Keep invented practice records out of the historical-evidence column.

Compare the journey explanations

The account supports investigating coordination and limited service obligations. It does not supply the exemption order itself or an inventory proving absolute scarcity. A service boundary is different from total absence of government. The traveler’s purpose and audience warrant scrutiny, but neither makes every reported event false. Compare corroborating records before deciding how representative the episode was.

The strongest diagram need not choose a single cause. It should identify which links rest on reported actions, reported speech or your inference. An alternative explanation deserves testing when it could account for the same observations.

Apply: choose evidence that could change your explanation

Consider two fictional archival discoveries, unrelated to any actual document supplied here:

• A dated order confirms a settlement’s ferry duty but expressly excludes providing mounts.
• A local inventory lists twenty animals but gives no information about ownership, fitness, location or availability to travelers.

Explain how each would change your confidence in the three hypotheses. Resist treating an inventory total as immediately usable transport. Then propose one additional record that could distinguish your two strongest explanations. State what result would make you revise your preferred explanation.

High school: submit the annotated arrows and one comparison-table row in your lesson notes. AP practice: write a causal paragraph using the real object and journey, acknowledging their different contexts and the narrator’s perspective. Introductory college: compare the relevant passage in another scholarly edition and investigate a contemporaneous administrative source; record inaccessible evidence as missing rather than reconstructing it.

Continue with the port case: would a merchant-host relationship produce the same obligations as official recognition? Identify an observable difference you would investigate. This comparison now includes an actual historical narrative, but it does not provide independent confirmation of every event, average travel performance or a system-wide measure of provisioning burdens.

Seasonal navigation: why a return journey needs its own plan

The National Weather Service explanation of monsoons describes a seasonal reversal near Arabian and Indian coasts: winds from the northeast in winter and from the southwest in summer. Wind names identify where air comes from. A southwest wind therefore moves generally toward the northeast. This modern meteorological explanation is not a dated medieval ship log.

Before opening the controls, draw two ports and opposite arrows. Predict whether an outward departure window also permits an immediate return. Then test how a longer stay can make a traveler miss the return window.

Plan a round trip through seasonal windows

Invented port A lies southwest of invented port B. Predict the return month before changing a control. We check departure months only: A → B opens June–September; B → A opens December–February. Each passage takes exactly one month. These are teaching rules, not historical schedules or navigation advice.

Ready at port AJanuary, year 1February, year 1March, year 1April, year 1May, year 1June, year 1July, year 1August, year 1September, year 1October, year 1November, year 1December, year 1 Required work at port B0 months1 month2 months3 months4 months5 months6 months

A → B, toward northeast: June, July, August, September.

B → A, toward southwest: December, January, February.

The other months have no departure in this model; they do not imply that real ships could never sail then.

1. Ready at AJune, year 1
2. Leave AJune, year 1
3. Arrive at BJuly, year 1
4. Work at B finishedAugust, year 1
5. Leave BDecember, year 1
6. Return to AJanuary, year 2

Total elapsed: 7 months. Outward wait 0 + sailing 1 + port work 1 + return wait 4 + sailing 1 = 7.

Waiting at B starts after the required work finishes; the two are not counted twice. Actions occur at the start of each named month. The earliest allowed departure is chosen automatically, including when readiness falls exactly on a window boundary.

Try September with 4 months of work, then 5. Explain why one added month can change the return date by much more than one month. Then compare May and June with 1 month of work: distinguish time since readiness from the calendar date of arrival home.

Reset voyage experiment

Temporary practice only; reset/reload restores June and 1 month. No saved evidence or completion status changes. Record your predictions and explanation in your notebook.

Explain the mechanism and its limits

Compare your two September plans. Separate sailing time, required work and waiting. Explain how a seasonal constraint could affect lodging, food supplies, storage and relationships with a port community. Those are hypotheses for historical investigation; this calendar does not calculate actual medieval costs or demonstrate that a merchant settled permanently.

The model deliberately omits wind variability, currents, storms, coastal routing, ship design, sailing techniques and political access. Its fixed windows and one-month passages are invented. A wind that favors a direction is not a guarantee of safe travel. Real routes require evidence at the appropriate location and season; do not apply this two-port schedule to the entire Indian Ocean.

Transfer: a closure changes the decision

In a fictional case, port work ends in February but officials close the port until March. Use the displayed return-window rule to calculate the next available departure. State what additional provisions would need investigation. Then challenge the model: what evidence about another route or sailing technology could make waiting an unnecessary choice? Explain why a valid answer under the model can differ from a historical decision.

High school: record a prediction, two schedules and an explanation of waiting. AP practice: connect environmental knowledge to exchange and distinguish the model from evidence of actual historical practice. Introductory college: compare a dated historical itinerary with a location-specific wind study, recording differences in dates, scale and uncertainty. An itinerary comparison and evidence about ships and navigators remain necessary before making historical performance claims.

Historical comparison: a route can change after departure

Locate two episodes without merging them

The Fordham selection of Ibn Battuta’s narrative, presented in H. A. R. Gibb’s 1929 translation, places his departure from Mecca toward Yemen after the pilgrimage of 1330. In the Red Sea passage, he reports two days of favorable wind, then a change that drove the vessel off course. The party landed and hired camels. This is a narrated change of transport, not a complete daily log or a measurement of typical sailing time.

The Berkeley ORIAS account of the 1341–1344 phase places a different disruption at Calicut: plans to continue toward China were broken by a storm, with ships lost while Ibn Battuta remained ashore. This is a modern educational retelling, not a second eyewitness. Do not use its broad section dates as the exact date of the storm or treat the two episodes as one voyage.

Experiment: reconstruct decisions rather than draw one arrow

Make two route strips. Give each strip a source label and use solid arrows for reported movements, dotted arrows for intentions. The supplied sources support different levels of detail; leave dates blank when they are not supplied.

These strips organize your reading; they are not geographic maps. Locate the Red Sea and Calicut on a reliable map before comparing their environments. Do not assign either episode to invented ports A and B merely to make the planner produce an answer.

For each strip, annotate three decisions: which were made before conditions changed, which could be reconsidered afterward, and which choices the packet does not document. Distinguish what the traveler reports experiencing from what a modern editor or historian contributes.

Test the model against the evidence

Create a table with the following rows and fill in supported, challenged, or not testable from this packet, followed by one reason:

• A favorable departure condition guarantees the same conditions throughout a passage.
• Every route requires exactly one month at sea.
• Waiting is the only possible response to an interruption.
• One disrupted voyage establishes a probability of shipwreck for all voyages.

Do not invent a monthly wind reading for a narrative that supplies none. A case can expose an omitted mechanism without giving enough data to estimate how often it matters.

Review the historical itinerary comparison

The reported change in conditions challenges a guarantee of an unchanged passage. A universal one-month rule has no support here: incomplete durations cannot be used to fit or validate it. The first strip includes a change of transport, so waiting is not the only reported response. Neither episode supplies the total number of voyages needed for a shipwreck rate. The two sources also do not independently corroborate one event; they concern different episodes and have different relationships to the narrative.

Your model comparison should preserve what the calendar teaches—how departure windows can create waiting—while identifying decisions it cannot represent. Avoid declaring the calendar historically accurate simply because one plan looks plausible.

Apply: propose a better investigation

A fictional researcher claims: “Our calendar predicts every medieval voyage because its return month matches one narrative.” Write a reply that identifies a missing comparison, proposes evidence that could contradict the claim and explains how to avoid tuning the rule to the same example used to test it. Possible evidence includes independently dated departures and arrivals, unsuccessful voyages, records from different seasons, and documentation of alternative routes. State how missing or selectively preserved accounts could affect the result.

High school: submit two annotated route strips and repair one overclaim. AP practice: explain an environmental influence on exchange alongside a human response, using the source dates and distinguishing narrative from retelling. Introductory college: inspect a scholarly edition and its chronology notes, then develop an itinerary table that preserves uncertain dates and changes of transport. The supplied packet is a starting comparison; it does not establish voyage statistics, regional wind calendars or the experience of everyone aboard.

Plague: connect evidence without inventing a death rate

Try: choose the evidence for the question

You find a description of disrupted funerals, dated tombstone inscriptions and a report of ancient DNA. Which could help investigate social responses, timing or the presence of a pathogen? Which would also need a population denominator before supporting a mortality estimate? Write a prediction before reading.

Two source windows

Florence, 1348, described in a literary work: the introduction to Boccaccio’s Decameron describes changes in care, burial and public authority. The Fordham selection identifies Rigg’s translation, published in 1921, volume 1, pages 5–11. Boccaccio describes both avoidance and assistance, and contrasts people’s responses. This is a literary narrative about the crisis, not a complete death register. Its claims about causes and remedies are historical beliefs to analyze, not evidence that those explanations were correct.

Central Eurasia, burials dated 1338–1339, investigated in 2022: Nature’s publisher summary, with English text reports research combining excavation archives, inscriptions and DNA from seven individuals at two cemeteries in present-day Kyrgyzstan. Three samples contained traces of Yersinia pestis, the plague bacterium. The summary reports a proposed connection between these findings and the pandemic’s origins. It is a summary of Spyrou and colleagues’ study, not the complete methods or dataset. These findings do not by themselves identify every intervening journey to Florence.

Experiment: build an evidence matrix

Create four rows: social response, date, pathogen presence, and population mortality. For each, identify what the packet supplies, what kind of inference is possible and what remains missing. Add a fifth row for a proposed transmission route. Do not draw an unbroken route merely because two places have evidence from different dates.

Text: an author's descriptions → interpretation of perspective and social experience.

Material research: a dated burial context → sampled remains → laboratory analysis → a bounded finding.

Population estimate: identified deaths within a defined group and interval ÷ the appropriate population at risk.

Each chain leaves questions. Ask how the text’s purpose shaped selection, how remains were selected and preserved, and whether the deaths and population refer to the same people and period. A missing detection is not automatically proof that a person never had the infection.

Calculate, then challenge the denominator

Three detections among seven sampled individuals give 3 ÷ 7 × 100 ≈ 42.9% of this sample. Explain why that arithmetic is not the percentage of the town’s residents who died. Neither a representative population sample nor the number of residents at risk is supplied here.

Now use a separate fictional archive. It contains 40 burial entries and a roster of 200 residents at the start of a year. Before calculating mortality, list the conditions needed: unique people, matched dates and geography, completeness, residency and an appropriate population definition. Burials alone also do not identify cause of death.

• Under the explicit assumption that all 40 entries are unique deaths among those 200 residents during that year and the records are complete, the proportion is 40 ÷ 200 = 20%.
• A revised reading finds that 10 entries duplicate other entries and 5 concern nonresidents. These groups do not overlap. How many distinct resident deaths remain documented? Recalculate the documented proportion, retaining uncertainty about missing deaths.
• A roster page was also lost. Explain why the earlier denominator must now be questioned; do not quietly replace it with a convenient number.

Review the plague evidence and calculation

The revised fictional numerator is 40 − 10 − 5 = 25 documented resident deaths. With the original 200-person denominator provisionally retained, 25 ÷ 200 = 12.5%. That is a conditional documented proportion, not a verified total mortality rate and not a plague-specific death rate. Once the roster is known to be incomplete, even that denominator needs reconstruction. No real medieval mortality estimate follows from these invented numbers.

The literary account can help frame questions about care, authority and unequal experience. Material findings can support a different kind of claim. Combining them does not remove their separate limits or turn a plausible transmission route into a documented itinerary.

Apply: explain a consequence without assuming it

A fictional exhibit claims: “Population loss automatically raised every survivor’s living standard.” Design a way to test this claim using dated wages, prices, land access and legal obligations. Explain whose experiences could differ and why a wage increase alone might not establish improved purchasing power or freedom. Use the narrative to formulate questions about disruption; seek separate economic records before asserting an outcome.

High school: submit the evidence matrix and explain one denominator error. AP practice: connect expanding networks with possible environmental consequences while separating documented findings, proposed mechanisms and unmeasured effects. Introductory college: inspect the original study’s sampling and chronology alongside a documentary source; record what you could access and what would require specialist review. The present packet does not replace that methods review or establish a continent-wide mortality percentage.

Continue to the comparative workshop. Add one paragraph explaining why a network’s benefits and harms require different evidence rather than a single score for how connected it was.

Build a comparative argument: what made movement possible?

Write before opening the examples

Explain how people and institutions made long-distance movement possible in two settings during c.1200–1450. Compare one shared mechanism and one important difference. Use dated evidence, explain how it supports your claim, and address one alternative explanation or limitation. Do not use the fictional station slips, route costs or calendar outputs as historical records.

Use the source menu to choose evidence. A comparison is not a list of everything you remember about two regions.

Setting	Supplied evidence	Question it can help investigate
Indian Ocean ports	The earlier Mogadishu host and Kilwa source cards	How did local intermediaries and different kinds of evidence shape our account of exchange?
Ming maritime encounter	Galle inscription investigation: early-fifteenth-century object mediated through a scholarly catalogue	How can a mission’s message be distinguished from delivery and local response?
Resident community in Quanzhou	1281 inscription and material interpretation	How could a continuing institution connect patrons, local resources and political authority?
Quanzhou maritime technology	Thirteenth-century wreck investigation	Which construction and cargo observations support a connection, and what would establish performance or changing trade volume?
Mongol domains	Late-thirteenth-century Yuan pass; Rubruck’s 1253 narrative; museum institutional overview	How did recognition, local obligations and access to resources interact?
Ilkhanid history-writing	Bolad and the Tabriz manuscript investigation	How did an intermediary, patrons and a workshop shape the movement and presentation of historical information?
Trans-Saharan caravan	Mali lesson’s 1352 caravan source	How did provisioning and advance contacts connect environmental constraints with social arrangements?

For a high-school response, use two clearly explained pieces of evidence in about 250–350 words. For AP practice, write about 400–500 words with a defensible thesis, contextualization and a comparison that develops across the argument. This is a teaching task, not an official AP question or scoring rubric. For introductory college, add an independently located source and a short account of its provenance; explain whether it corroborates the same event or supplies a different perspective. Length supports planning and is not a quality score.

Keep the initial response in your notebook or existing lesson notes. Record assistance used and preserve a copy before revision. Reading these public examples is guided practice; it does not become an unseen assessment on another course path.

Review criteria

For each criterion, mark demonstrated, needs revision, or not yet evidenced, and quote a sentence from the response to justify the judgment. Do not award a total from word count, source count or agreement with the example.

Criterion	Evidence of a successful response	Targeted revision when missing
Comparative claim	A specific similarity and difference answer the question.	Replace “both traded” with a mechanism and explain where it operated differently.
Historical evidence	Sources are attributed and dated; the response distinguishes object, narrative and interpretation.	Add provenance and remove invented values used as historical facts.
Causal reasoning	Evidence connects an arrangement to a possible or reported outcome without treating intention as success.	Explain the intervening people, resources or decisions; qualify unsupported outcomes.
Limits and revision	An alternative or missing perspective changes the scope of the conclusion.	State which claim would change if new evidence appeared and why.

Read a worked comparative argument

In the supplied Mongol and trans-Saharan cases, movement depended on converting arrangements made in advance into help at particular places. The Yuan pass’s late-thirteenth-century inscription claimed imperial authority, but an object bearing that claim is not an arrival record. The 1352 caravan narrative instead directs attention to contacts and messages ahead of travelers. Both suggest coordination across distance; they do not establish identical obligations or equal access to help.

Rubruck’s 1253 account gives a useful qualification to a claim that imperial authority automatically solved transport problems. A reported limitation on local services could interrupt a traveler’s plan even within a wider system of rule. The caravan account likewise invites inquiry into how information reached people able to provide support. The mechanisms involve people interpreting expectations and obtaining resources, not merely possession of transport animals.

Environment remains an alternative emphasis, rather than something the institutional explanation should exclude. The need to move people and supplies through difficult conditions helps explain why arrangements mattered. Yet neither narrative supplies a complete measure of costs, and the two Mongol sources concern different dates and settings. The comparison therefore supports a bounded claim about coordination, not a ranking of network efficiency or a conclusion that all travelers were protected. Workers’ accounts and dated administrative records could alter that judgment.

Reviewer note: this is one defensible response, not the required wording. Its limited evidence supports institutional comparison, while its own qualifiers prevent a claim about all journeys. A stronger extended response would investigate who could obtain support and who bore its costs.

Consider a different defensible argument

A learner could argue that local relationships were more immediately visible in the supplied evidence than centralized guarantees, comparing port hosts with caravan contacts. The argument would need to explain a real difference—for example, mediation of transactions versus coordination of a meeting—and avoid treating those descriptions as a complete account of either system.

Two passages attributed to Ibn Battuta are not independent witnesses merely because they concern different places. They can support a cross-regional comparison of his descriptions, but their shared narrator and transmission remain a limitation. A material source or independently produced record may broaden the evidence; it is not automatically more reliable simply because it is different.

Try a resource decision: who pays for coordination?

A network can help travelers while placing different burdens on the people supporting it. Use this invented classroom planning case, not a reconstruction of a medieval budget. A town is arranging a public delivery of library books. Compare three proposals for one week. A credit is a fictional accounting unit; a volunteer-hour is one person’s hour of work. Six boxes must arrive by Friday, spending cannot exceed 12 credits, and volunteers have offered at most 8 hours in total. Treat the listed deliveries as predictions for this first comparison, not measured results.

Proposal	Town spending (credits)	Volunteer work (person-hours)	Boxes predicted by Friday
Town cart with extra loading help	8	12	7
Shared cart reservation	12	6	6
Purchased delivery service	16	2	8

Before choosing, mark each proposal against all three constraints. Name the exact constraint each rejected option fails. Do not combine credits and hours into one total: they measure different things. An option with the most boxes is not automatically feasible, and the least expensive option can require more work than people have offered.

Write a three-sentence recommendation: the choice, the evidence that it meets the requirements, and one uncertainty to check before committing. Then respond to these updates without erasing your original recommendation:

1. The town’s available budget falls to 10 credits. Does any listed proposal still meet every requirement? Identify a change that would need negotiation rather than pretending a constraint disappeared.
2. Restore the 12-credit budget. The shared cart’s Friday capacity is revised from six boxes to five. Explain why the original spending and labor checks no longer establish a feasible delivery.
3. A coordinator says “six volunteer-hours means six volunteers.” Give two different arrangements totaling six person-hours, and explain why availability at the loading time must still be checked.

Review the resource decision and its revisions

Initially, only the shared cart meets all three limits: 12 credits is within the budget, 6 person-hours is within the offered 8, and 6 boxes meets the target. The town cart exceeds offered labor by 4 person-hours; the purchased service exceeds the budget by 4 credits. These comparisons do not show that the shared cart is best under every possible objective.

With a 10-credit budget, no listed proposal is feasible. A possible next step is to seek a revised price or ask whether the deadline can change; neither is an approved change simply because it would solve the calculation. With the restored budget but a five-box capacity, the shared cart misses the target by one box. Recheck the entire plan after any negotiated revision.

Three people working two hours each and two people working three hours each both total six person-hours. Neither arrangement establishes that those people are available together, that tasks can be divided that way, or that every participant bears an equal burden. The totals alone cannot answer those questions.

Return to the historical sources: identify who claimed authority, who supplied resources and whose account survives in one case from the source menu. Explain what records would be needed to examine the distribution of costs. The library exercise helps separate resources, constraints and outcomes; its prices, voluntary arrangements and predicted deliveries are not evidence about Mongol, Indian Ocean or trans-Saharan institutions.

Choose your depth: high-school learners submit the constraint checks and one revision; AP learners add a paragraph separating the planning analogy from a dated historical claim; introductory-college learners propose a source collection that could test who bore costs, including whose unpaid work might be absent from accounts. No option or completed worksheet automatically establishes historical understanding.

Revise when the evidence changes

Use this fictional archival update: a receipt confirms that one traveler obtained supplies, while another record describes a dispute over who had to provide them. Add a paragraph explaining what each record would strengthen, what it would complicate and what remains unknown. A verified delivery and a dispute can coexist; neither alone establishes a system-wide success or failure rate.

Exchange responses with a reviewer when one is available. Ask for a cited example under each criterion, one defensible alternative interpretation and one concrete revision. Record the reviewer’s actual comments and your revision; do not invent a review or mark course mastery merely because the template is filled. If working alone, label the process self-review and name the question you still need help resolving.