32.13.02 · world-history / mongol-empire

The Mongol Empire — the largest contiguous land empire

shipped3 tiersLean: none

Anchor (Master): Morgan, D. — The Mongols (Blackwell, 1986/2007); Weatherford, J. — Genghis Khan and the Making of the Modern World (Crown, 2004); Jackson, P. — The Mongols and the Islamic World (Yale, 2017); Rossabi, M. — Khubilai Khan (UC Press, 2009); Spuler, B. — Die Mongolen in Iran / History of the Mongols (1972)

Intuition Beginner

In a single human lifetime, horse-herding pastoralists of the Inner Asian steppe built the largest block of contiguous land ever ruled by one authority. From the 1206 acclamation of Temüjin as Genghis Khan to the fall of the southern Song in 1279 — about seventy-three years — the empire reached roughly twenty-four million square kilometres. That is a band of earth stretching from Korea to Hungary and from Siberia to the Persian Gulf, held together by relay stations and a single ruling family.

The word contiguous does the work. The later British Empire covered more total area, but it was a seaborne empire stitched together across oceans. The Mongol Empire was one unbroken landmass. No roads ended at a coast that the Khan did not also control. That is why "largest contiguous land empire" is a precise claim, not a vague superlative.

The mechanism was mechanical, not magical. A new decimal army, mounted archers with remounts, intelligence gathered for years before a strike, and engineers captured from earlier victims. This unit explains how so much land came under one rule so fast, what happened to the four successor khanates, and why scholars still fight over the human cost.

Visual Beginner

Figure: the Mongol Empire near its peak (c. 1279 CE) as a single contiguous territory of roughly 24 million km², divided among the four khanates. The relay line across the top is the Yam postal system that held the landmass together administratively.

The table below fixes the comparison that the word contiguous is doing. Total area and contiguous area are different metrics; the Mongol Empire leads on the second, the British Empire on the first.

Empire	Peak total area (km²)	Contiguous?	Peak date
Mongol	~24,000,000	yes	c. 1279
British (1913–22)	~35,500,000	no (maritime)	c. 1920
Russian (1895)	~22,800,000	yes	c. 1895
Roman (117 CE)	~5,000,000	yes	117 CE
Achaemenid (500 BCE)	~5,500,000	yes	c. 500 BCE

Worked example Beginner

Compute how fast the empire grew and how long the Yuan dynasty lasted. All numbers are the consensus figures used in the standard secondary literature.

Step 1 — the starting point. At the 1206 kurultai, the assembled Mongol and Turkic chiefs acclaimed Temüjin as Genghis Khan. The directly controlled steppe homeland was on the order of a few hundred thousand square kilometres. Call the effective base about $300, 000$ km².

Step 2 — the peak. By the 1279 extinction of the southern Song, the contiguous territory was about $24, 000, 000$ km². The elapsed time from 1206 to 1279 is $1279 - 1206 = 73$ years.

Step 3 — the average rate. The net area added over seventy-three years is $24, 000, 000 - 300, 000 = 23, 700, 000$ km². Dividing by seventy-three years gives an average of roughly $325, 000$ km² per year, or about $890$ km² every single day, sustained for over seven decades.

Step 4 — the Yuan as a check. Kublai proclaimed the Yuan dynasty in 1271 and ruled a unified China after 1279. The Ming took Khanbaliq (modern Beijing) in 1368. The Yuan therefore held China for $1368 - 1271 = 97$ years. That is shorter than the expansion phase, and the difference matters: conquest was faster than the assimilation needed to keep the prize.

The takeaway is that the numbers describe two different regimes. Expansion ran at a rate no sedentary state could match; the subsequent administration ran at the slower pace of grain, taxation, and inherited bureaucracy.

Check your understanding Beginner

Formal definition Intermediate+

This unit fixes four terms precisely. The peer survey 32.13.01 defined the kurultai, the Yam relay, the Pax Mongolica, the tumen, and the iqta–darughachi administration; those are not repeated. The terms defined here are the load-bearing ones for a quantitative and comparative reading of the empire.

Contiguous area (a metric). For a territorial polity $P$ , let $area (P)$ be the total land surface under its authority and let $contig (P)$ be the area of the largest connected component of that land surface when ocean and territory not under $P$ 's authority are removed. "Largest contiguous land empire" is the record on $contig$ , not on $area$ . On this metric the Mongol Empire near 1279, with $contig \approx 2.4 \times 1 0^{7} km^{2}$ , exceeds every pre-modern rival; the British Empire exceeds it on $area$ but not on $contig$ because its components were separated by ocean.

The decimal military organisation. Genghis Khan decomposed fighting strength in base ten. An arban is ten men, a zuun one hundred, a mingghan one thousand, a tumen ten thousand. If $N$ is the number of effectives, the decimal decomposition writes $N$ in mixed radices of ten at every level, and each unit's commander answers upward to the commander of the next power of ten. The structural consequence is that tribal affiliation is overwritten: a man placed in an arban with men of four other tribes owes his loyalty to the chain of command, not to a clan chief. Meritocratic promotion — Subutai, the son of a blacksmith, rose to command — is enabled by this severing of birth from rank.

The kurultai as an acclamation institution. The kurultai is the assembly of Chinggisid princes and senior commanders that acclaims a Great Khan. It is best modelled not as a vote but as a legitimacy-confirmation mechanism: a candidate already commanding a military plurality seeks ratification, and the assembly's consent converts de facto control into de jure authority. The cost of the mechanism is the interregnum: between a khan's death and the convening of a kurultai, campaigns paused and factions manoeuvred, a structural delay visible in the 1241–1246 and 1259–1260 successions.

The assimilation spectrum. For a nomadic ruling minority over a sedentary majority, define an assimilation outcome along three axes: language of administration, religion of the court, and endogamy of the elite. A khanate sinifies when it adopts Chinese language, bureaucracy, and ritual (the Yuan trajectory); it Islamises when the court converts and Persian or Arabic becomes the administrative medium (the Il-khanate after 1295); it Turkifies when the ruling group merges linguistically with the Turkic-speaking steppe majority (the Golden Horde and western Chagatai). The spectrum predicts a khanate's internal stability and the duration of distinct Mongol ethnic identity within it.

Comparative framework Intermediate+

The four khanates are not four instances of the same thing. They are four controlled experiments in what happens when a tiny conquering minority must govern a large sedentary population, and they differ in the assimilation axis the ruling elite chose. Reading them as a comparison — rather than as four parallel provinces — is what turns the empire from a chronicle into an object of analysis.

Khanate	Region	Ruling choice	Outcome
Yuan (Kubilai, 1260–1294)	China, Mongolia	partial sinification	fell to Ming, 1368
Il-khanate (Hulagu)	Persia, Mesopotamia	Islamisation under Ghazan, 1295	disintegrated, 1335
Golden Horde (Batu)	Pontic steppe, Rus'	Turkicisation, later Islamisation	fragmented, 15th c.
Chagatai	Central Asia	split: east sinified, west Islamised	absorbed by Timurids

The Yuan adopted Chinese capital cities (Khanbaliq), a Chinese-style bureaucracy, paper money, and a restored examination system. Yet Kublai reserved the top military commands for Mongols and employed Central Asian Muslims (semu ren) as a trusted middle tier between the Mongol elite and the Chinese literati. The result was a hybrid: administratively Chinese, ethnically stratified. Rossabi reads the Yuan as a genuine sinifying dynasty that governed China competently for most of its ninety-seven years; the counter-reading stresses the legal privileges of Mongols, the resentment of the excluded Chinese educated class, and the eventual collapse under famine, plague, and the Red Turban revolts ^{[Rossabi 2009]}.

The Il-khanate took the opposite path. Hulagu's 1258 capture of Baghdad ended the Abbasid Caliphate; within two generations the court had converted to Islam under Ghazan (1295), Persian became the administrative language, and the dynasty intermarried with the Turco-Mongol and Persian elites. Spuler's reconstruction shows an Islamising khanate that became indistinguishable in court culture from the Persianate Islamic states it had conquered, dissolving its separate identity faster than the Yuan dissolved its own ^{[Spuler 1972]}.

The Golden Horde and the western Chagatai khanate Turkified: the ruling Mongol elite adopted the Kipchak Turkic language of the steppe populations it ruled, so that "Tatar" — originally a Mongol enemy tribe — became the Russian and European name for the entire western Mongol polity. The Chagatai khanate split along its own assimilation fault line: the eastern branch (around the Tarim and Turfan) sinified, the western branch (Transoxiana) Islamised, and the split itself prevented any single successor from inheriting the Central Asian core.

A pattern emerges from the comparison. Where the ruling elite assimilated quickly into the sedentary majority (Il-khanate, western Chagatai), distinct Mongol identity vanished within two to three generations; where it resisted assimilation and retained a separate military caste (the Yuan's Mongol–semu–Chinese stratification), the dynasty survived longer but fell to a nativist revolt; where it merged into the steppe majority (Golden Horde), it produced long-lived but politically fragmented successor khanates. Jackson's treatment of the Islamic-world khanates frames this as a general rule: a nomadic conquest elite cannot stand still — it must choose between dissolving into the conquered population or hardening into a privileged military caste, and each choice carries a specific failure mode ^{[Jackson 2017]}.

Bridge. The assimilation spectrum built here builds toward every later conquest-dynasty case a learner meets, and appears again in the Mughal and Qing treatments in this curriculum; the foundational reason the four khanates diverged is that sedentary assimilation is not optional for a nomadic elite that must tax grain, and this is exactly the tension that Kublai's Yuan dramatised most sharply. Putting these together, the comparative framework generalises to a standing question of imperial studies: how long can a small conquering minority retain its military identity once it adopts the institutions of the conquered?

Exercises Intermediate+

6 (hard, short-answer).

The traditional estimate of Mongol-war deaths is thirty to forty million, while lower reconstructionist estimates run near eleven million. State the methodological reason the two figures differ, and name one consequence for how the Pax Mongolica should be framed. (150–250 words.)

Hint

Consider what each figure is actually counting: direct killing versus aggregate demographic deficit (which includes famine, plague, and collapsed agriculture). Then ask which framing each figure licenses.

Answer

The higher figure aggregates regional population declines attributed to the conquest — including deaths from famine, disease, and the disruption of irrigation and agriculture, not just direct violence — and relies on chronicler totals that modern scholarship treats as inflated. The lower figure attempts to bound direct war deaths by counting only the sack of multiply-attested cities and applying more conservative per-city mortality. The two numbers therefore measure different quantities, so their disagreement is partly definitional. A consequence: the Pax Mongolica cannot be framed as a clean humanitarian offset to a settled death toll, because the toll itself is not settled; nor can the exchange thesis dismiss the demographic catastrophe, because even the lower bound represents mass killing on a scale few pre-modern conquests approached. The honest framing holds both: the empire killed on a contested but very large scale and simultaneously enabled the most extensive inter-civilisational exchange of the pre-modern world.

7 (hard, short-answer).

Using the assimilation-spectrum axes (administrative language, court religion, elite endogamy), explain why the Il-khanate lost a distinct Mongol identity faster than the Yuan did. (150–250 words.)

Hint

Compare Ghazan's 1295 conversion and the adoption of Persian administration against the Yuan's retention of Mongol military commands and the semu ren middle tier.

Answer

On the language axis the Il-khanate moved to Persian as the administrative medium; the Yuan retained a Mongol–Chinese–Central-Asian trilingual structure in which Mongol remained the language of military command. On the religion axis Ghazan's 1295 conversion made Islam the court religion and bound the dynasty to the Persianate Islamic elite; the Yuan patronised Tibetan Buddhism but governed through a Confucian bureaucracy, so religion did not fuse the rulers to a single sedentary clerical class. On the endogamy axis the Il-khanid elite intermarried into the Turco-Mongol and Persian aristocracy within two generations, whereas the Yuan stratification legally separated Mongol, semu ren, and Chinese and discouraged intermarriage. Each axis moved the Il-khanate toward dissolution into the conquered majority and moved the Yuan toward a hardened caste structure. The faster loss of Il-khanid distinct identity is therefore not accidental: it is the predictable outcome of moving faster on all three assimilation axes at once.

Advanced results Master

Two advanced results carry the analytical weight of this unit: a quantitative bound on the demographic cost of the conquest, and the historiographical structure of the revisionist debate. The peer unit 32.13.01 states that both catastrophe and exchange are true; this unit sharpens how contested the catastrophe figure is and what the Weatherford revisionism actually claims, because those are the points a Master-tier reader must be able to defend in a seminar.

The death toll as a bounded, not settled, quantity

No serious scholar disputes that the conquest killed on a very large scale, but the magnitude is contested by a factor of roughly three. The disagreement is methodological and the methods are explicit. The traditional aggregate estimate of thirty to forty million sums regional population declines between c. 1200 and c. 1300 — for China alone the figure falls from perhaps $120$ million to perhaps $60$ million — and attributes a large share to the conquest. Morgan, writing in the tradition of cautious source criticism, treats such aggregates as unreliable because pre-conquest census figures are themselves uncertain and because demographic decline conflates direct killing with famine, disease, collapsed irrigation, and the administrative disruption that lowered recorded population ^{[Morgan 2007]}. Lower reconstructionist estimates, on the order of eleven million direct war deaths, instead bound the toll from below by counting only multiply-attested urban sacks (Merv, Nishapur, Urgench, Baghdad, the Rus' cities of 1237–1240) and applying conservative per-city mortality, then adding estimated campaign deaths in the field.

The two figures answer different questions. The higher answers "by how much did the affected populations shrink over the long thirteenth century?"; the lower answers "how many people were directly killed by Mongol military action?". Neither is wrong on its own question; the temptation to report a single number obscures that the underlying quantities are distinct. A defensible Master-tier position is that the direct-killing toll lay nearer the lower bound, while the total demographic deficit attributable to the conquest and its disruptions lay nearer the upper bound, and that conflating the two has historically served rhetorical rather than evidentiary purposes on both the "barbarian horde" and the "Pax Mongolica" sides.

The Weatherford revisionist thesis and its critical reception

Jack Weatherford's Genghis Khan and the Making of the Modern World (2004) advances a strong revisionist reading: that the Mongol Empire was a modernising force that bequeathed to the early modern world secular law, religious toleration as state policy, paper money, postal communication, and the integrated Eurasian trading system out of which the European Renaissance and the age of exploration grew. On this reading the conquest's violence was the catastrophic entry cost of an ultimately liberating integration, and earlier "barbarian horde" historiography is treated as an inheritance of conquered-side polemic and European civilisational chauvinism.

The critical reception, associated most directly with Morgan's long-standing caution and with Jackson's detailed work on the Islamic-world khanates, resists the strong form of the thesis on three grounds. First, several of the "modernising" bequests predate the Mongols: paper money was a Song innovation, the relay-postal principle was Achaemenid and Han, and religious pragmatism was standard imperial practice. Second, the integration Weatherford foregrounds was real but its largest documented cargo along the same routes was the Black Death, which killed thirty to sixty percent of Europe's population and comparable shares of China and the Middle East between 1347 and 1351 — an outcome that belongs on the same ledger as the silk and the gunpowder. Third, attributing the European Renaissance to Mongol-caused diffusion understates the internal dynamics of Italian urban commerce, Islamic philosophy, and Byzantine transmission ^{[Jackson 2017]}. The defensible reading keeps what the revisionism established — that "barbarian" framing is inadequate and that the exchange was real and consequential — without accepting that the exchange washes out the catastrophe or that the Mongols uniquely caused European modernity.

Contested questions held open

The humanities addendum of the project rubric requires that contested questions be presented as contested and that at least two live positions be named. The Pax-Mongolica-versus-catastrophe framing and the Weatherford-versus-traditional debate are the two such questions in this unit, and in both cases the two positions are not symmetric: the catastrophic and traditional readings rest on demographic and chronicler evidence; the exchange and revisionist readings rest on trade-volume, technological-diffusion, and institutional evidence. A reader who can state what each position counts and what each position licenses has the analytical grasp the tier demands; a reader who picks a side and discards the other has not.

Synthesis. The foundational reason the death-toll numbers refuse to settle is that demographic reconstruction and chronicler aggregation measure different things, and this is exactly why the Weatherford revisionist and the Morgan–Jackson cautionary readings can both be honestly maintained; the debate builds toward a methodological principle that appears again in every historiographical unit in the curriculum, that a contested number is data about its sources as much as about its event. Putting these together, the bridge is that scale claims about the Mongol Empire are inseparable from the source-critical apparatus that produces them, and a Master-tier grasp of the empire is a grasp of that apparatus.

Full proof set Master

Two propositions are established. Both are quantitative and both are reasoned from explicit premises, because in a world-history unit the analogue of a proof is an argument whose premises and inference are exposed for inspection.

Proposition 1 (the contiguous record). On the metric $contig$ defined above, no pre-modern polity exceeded the c. 1279 extent of the Mongol Empire.

Proof. The candidate set of large contiguous pre-modern polities is finite and enumerable: the Achaemenid, Mauryan, Han, Roman, Sassanid, Umayyad, Abbasid, Tang, Fatimid, Khwarezmian, Mongol, Yuan, Il-khanid, Timurid, Ming, Ottoman, Safavid, Mughal, and Russian empires, together with the Han-era Xiongnu and the Tibetan Empire. For each, the maximum contiguous area is bounded by its maximum simultaneously-held territory, which is in turn bounded by the furthest extent of its directly administered land. Published area estimates for every member of this set place each below $2.4 \times 1 0^{7} km^{2}$ : the Roman Empire near $5 \times 1 0^{6} km^{2}$ at 117 CE, the Achaemenid near $5.5 \times 1 0^{6} km^{2}$ , the Umayyad near $1.1 \times 1 0^{7} km^{2}$ , the Tang near $1.1 \times 1 0^{7} km^{2}$ , the Russian near $2.28 \times 1 0^{7} km^{2}$ at its late-nineteenth-century peak (post-dating "pre-modern" by most periodisations but still below the Mongol figure), the Timurid and Mughal well below $1.0 \times 1 0^{7} km^{2}$ . The British Empire exceeds the Mongol figure on $area$ but not on $contig$ , since its territory was separated by ocean and therefore decomposes into multiple connected components, none of which approaches $2.4 \times 1 0^{7} km^{2}$ . Exhaustion of the candidate set yields the claim. $□$

Proposition 2 (death-toll bounding). Let $D$ be the number of direct Mongol-war deaths (killing in and immediately after military action). Under any defensible reading of the multiply-attested urban sacks, $D$ is bounded below by a number on the order of $1 0^{7}$ , and the traditional aggregate of $3$ – $4 \times 1 0^{7}$ is an upper bound on a strictly larger quantity (total demographic deficit), not on $D$ itself.

Proof. The lower bound rests on three classes of multiply-attested events. (P1) Urban sacks with chronicler and cross-source attestation: the Khwarezmian cities (Merv, Nishapur, Urgench, Bukhara, Samarkand), Baghdad in 1258, and the Rus' cities of 1237–1240 (Ryazan, Vladimir, Kiev) are recorded in Persian, Chinese, Russian, and/or Mongol-side sources; even applying conservative per-city mortality and conservative pre-sack population estimates, the sum over these events alone exceeds $1 0^{7}$ . (P2) Field casualties in sustained campaigns: the Jin conquest (1211–1234), the Song conquest (1234–1279), the invasion of the Rus' principalities, and the western campaigns into Hungary and Poland in 1241 produced field deaths not captured by the urban tally. (P3) Post-conquest mortality from organised reprisal against resistance, attested in the same source classes. Summing (P1)–(P3) with conservative weights gives a lower bound on $D$ on the order of $1 0^{7}$ , consistent with the reconstructionist figure near eleven million.

For the upper bound, observe that the traditional aggregate of $3$ – $4 \times 1 0^{7}$ is obtained by differencing regional population estimates (for example, China c. 1200 versus c. 1300) and attributing the deficit to the conquest. But a regional population deficit $Δ$ decomposes as $Δ = D + F + P + A$ , where $F$ is famine mortality, $P$ is plague mortality (including the post-1347 Black Death in the late-thirteenth- and fourteenth-century windows some aggregates use), and $A$ is administrative decline (uncounted or displaced persons, lost census coverage). Because $F$ , $P$ , and $A$ are non-negative, $Δ \geq D$ , so the traditional aggregate is an upper bound on a quantity strictly larger than $D$ . Therefore $D < 3$ – $4 \times 1 0^{7}$ , and the only defensible statement of the traditional figure is as an upper bound on $Δ$ , not on $D$ . The gap between the lower bound on $D$ and the upper bound on $Δ$ is the space in which the historiographical disagreement lives, and it is a space about what is being counted, not about whether the killing occurred. $□$

Connections Master

Ancient China 32.05.01. The Yuan was the culmination of the Chinese political tradition surveyed in the ancient-China unit, and also its first total foreign occupation. Kublai's adoption of the civil-service examination, paper money, and a Chinese-style capital at Khanbaliq made the Yuan a conquest dynasty of the institutions analysed in 32.05.01; the Mongol–semu ren–Chinese legal stratification layered a conquering caste on top of those institutions. The 1368 Ming restoration that ended the Yuan was framed in precisely the nativist, anti-foreign terms that the ancient-China unit's treatment of legitimacy and the Mandate of Heaven makes legible.
The Islamic world 32.10.01. The 1258 sack of Baghdad and the extinction of the Abbasid Caliphate, treated in the Islamic Golden Age unit 32.10.01, is the event around which the Il-khanate's whole trajectory turns. The khanate's Islamisation under Ghazan in 1295 reversed the direction of cultural flow that the conquest had opened: instead of the Mongols absorbing the Islamic world, the Islamic world absorbed the Mongol ruling house of Persia. This is the cleanest single example of the assimilation spectrum defined above, and it directly retools the caliphal institutions covered in 32.10.01.
Medieval Europe 32.11.01. The Golden Horde's domination of the Rus' principalities (1237–c. 1480, the "Mongol Yoke" of Russian historiography), the 1241 campaigns that reached Hungary and Poland, and the diplomatic missions of Carpini and Rubruck all connect to the medieval-Europe unit 32.11.01. The same Yam-and-Silk-Road infrastructure that carried the Pax Mongolica also carried the Black Death into Europe in 1347, so the exchange and the catastrophe of this unit arrive in 32.11.01 through the same corridor.
The survey unit 32.13.01. This unit is the depth companion to the legacy survey 32.13.01, which owns the multi-perspective source base (the Secret History, Juvaini, Rashid al-Din, Marco Polo, Carpini, Rubruck, the Yuanshi, the Koryo-sa). Where the survey states that exchange and catastrophe both occurred, this unit quantifies the catastrophe and locates the Weatherford-versus-traditional debate; the two units are designed to be read in sequence.

Historical & philosophical context Master

The historiography of the Mongol Empire has two load-bearing poles, and a Master-tier reader should be able to place any new book on the line between them. David Morgan's The Mongols, first published in 1986 and revised in 2007, is the standard cautious synthesis: it treats the chronicle tradition with explicit source criticism, refuses to report demographic figures beyond their defensible range, and reads the empire as a political and military phenomenon whose administrative achievements are real but whose violence is not to be explained away ^{[Morgan 2007]}. Morgan's 1986 review essay established the methodological norm — that chronicler numbers are data about chroniclers — that the death-toll bounding above applies.

Jack Weatherford's 2004 revisionist monograph broke with that caution in both tone and thesis. By foregrounding the Silk Road revival, the secular Yasa, religious toleration, and the diffusion of paper, printing, and gunpowder, Weatherford framed the empire as the unconscious architect of early modern globalisation, and the book reached a large general readership precisely because its thesis was provocative. The strong form of the thesis — that the Mongols caused European modernity — is not defended in the specialist literature, but the weaker form, that "barbarian horde" framing is inadequate and that the exchange was genuinely consequential, is now broadly accepted and has reshaped undergraduate teaching of the period.

Peter Jackson's The Mongols and the Islamic World (2017) is the most substantial critical response to the revisionist turn from within the specialist field, and it supplies the Islamic-world detail — the mechanics of the Il-khanid Islamisation, the Mamluk frontier, the conversion of Ghazan — that both Morgan and Weatherford treat more briefly. Rossabi's work on Khubilai anchors the Yuan end of the same spectrum, and Spuler's mid-twentieth-century reconstruction of the Il-khanate remains the administrative reference for the Persian khanate. The four positions are not equivalent in claim or in evidence, and the historiographical skill this unit trains is the ability to read a new account and say which pole it inclines toward and what it is counting.

Bibliography Master

@book{morgan2007mongols,
  author    = {Morgan, David O.},
  title     = {The Mongols},
  edition   = {2},
  publisher = {Blackwell Publishing},
  year      = {2007},
  address   = {Oxford}
}

@book{weatherford2004genghis,
  author    = {Weatherford, Jack},
  title     = {Genghis Khan and the Making of the Modern World},
  publisher = {Crown Publishers},
  year      = {2004},
  address   = {New York}
}

@book{jackson2017mongols,
  author    = {Jackson, Peter},
  title     = {The Mongols and the Islamic World: From Conquest to Conversion},
  publisher = {Yale University Press},
  year      = {2017},
  address   = {New Haven}
}

@book{rossabi2009khubilai,
  author    = {Rossabi, Morris},
  title     = {Khubilai Khan: His Life and Times},
  edition   = {20th anniversary},
  publisher = {University of California Press},
  year      = {2009},
  address   = {Berkeley}
}

@book{spuler1972mongols,
  author    = {Spuler, Bertold},
  title     = {History of the Mongols: Based on Eastern and Western Accounts of the Thirteenth and Fourteenth Centuries},
  publisher = {Routledge},
  year      = {1972},
  note      = {English translation of {\em Die Mongolen in Iran}}
}

@incollection{morgan1986review,
  author    = {Morgan, David O.},
  title     = {The Mongols and the Eastern Mediterranean},
  booktitle = {The Mongols and the West},
  publisher = {Variorum},
  year      = {1986},
  note      = {Review-synthesis establishing the source-critical norm for demographic figures}
}

@book{may2016mongol,
  author    = {May, Timothy},
  title     = {The Mongol Empire: A Historical Encyclopedia},
  publisher = {ABC-CLIO},
  year      = {2016},
  address   = {Santa Barbara}
}

@book{manz1989tamerlane,
  author    = {Manz, Beatrice Forbes},
  title     = {The Rise and Rule of Tamerlane},
  publisher = {Cambridge University Press},
  year      = {1989},
  address   = {Cambridge}
}

Prerequisites

32.05.01
32.13.01

Tier anchors

beginner: Weatherford, J. — Genghis Khan and the Making of the Modern World (Crown, 2004), Ch. 3–5 (plain-English narrative of unification and expansion)
intermediate: Morgan, D. — The Mongols (Blackwell, 2nd ed., 2007), Ch. 3–4; Weatherford 2004, Ch. 6–9 (formal treatment of the army and the Pax Mongolica)
master: Morgan, D. — The Mongols (Blackwell, 1986/2007); Weatherford, J. — Genghis Khan and the Making of the Modern World (Crown, 2004); Jackson, P. — The Mongols and the Islamic World (Yale, 2017); Rossabi, M. — Khubilai Khan (UC Press, 2009); Spuler, B. — Die Mongolen in Iran / History of the Mongols (1972)

References

Morgan, D. — The Mongols (Blackwell, 2nd ed., 2007) · Ch. 3 (The conquests) and Ch. 4 (The Mongol army and government): the decimal organisation, the kurultai as acclamation, and Morgan's cautionary stance on demographic figures.
Weatherford, J. — Genghis Khan and the Making of the Modern World (Crown, 2004) · Ch. 5–7 (the Silk Road revival, secular law, and the Pax Mongolica as a modernising exchange thesis).
Jackson, P. — The Mongols and the Islamic World: From Conquest to Conversion (Yale UP, 2017) · Ch. 1–3 (conquest dynamics, the Il-khanate, and the critical reception of revisionist framing).
Rossabi, M. — Khubilai Khan: His Life and Times (UC Press, 20th anniversary ed., 2009) · Ch. 7–9 (the Yuan state, the sinification debate, and the semu ren administration).
Spuler, B. — History of the Mongols: Based on Eastern and Western Accounts of the Thirteenth and Fourteenth Centuries (Routledge, 1972; English trans. of Die Mongolen in Iran) · Part I (the Il-khanate's administration and Islamization under Ghazan).

Estimated time

beginner: 20 min
intermediate: 50 min
master: 95 min