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Mongol Administration, Yam and Pax Mongolica Class 11

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HistoryCBSE Class 11 · Nomadic Empires

Mongol Army, Ulus, Yam, Pax Mongolica and the Legacy of Genghis Khan (Class 11 History, Nomadic Empires)

Updated 17 October 2026 · Fact-checked

Genghis Khan reorganised the Mongols into a decimal army that broke tribal ties, shared the empire among his four sons as ulus under a collective quriltai, and ran the yam courier system on the qubcur tax. His successors reached Russia, Baghdad and all China; Pax Mongolica boosted Silk Route trade. He is remembered as a destroyer by settled peoples and a great leader by Mongols.

Notice that Genghis Khan mixed members of old tribes into new units, so loyalty moved to him, and the units grew in tens up to the 10,000-strong tuman.

Illustration drawn for QuestionBuddy.

Understand Mongol Army, Ulus, Yam and Pax Mongolica: Organisation and Legacy

Why this topic matters. The syllabus asks for the Mongol army, governance and the contrasting images of Genghis Khan.

1. Decimal army. All able-bodied adult men bore arms. The army used units of 10, 100, 1,000 and notionally 10,000 (the tuman). Genghis Khan broke up old tribal groups and spread their members across new units, punishing anyone who left without permission. This gave members a new identity derived from him.

2. New aristocracy. Units served under his four sons and chosen captains called noyan. Loyal followers were honoured as anda (blood-brothers) and humbler freemen were made naukar (bondsmen). Status came from closeness to the Great Khan, not from old clan chieftainship.

3. Ulus. The empire was shared among four sons: Jochi (Russian steppes), Chaghatai (Transoxiana and lands north of the Pamirs), Ogodei (named Great Khan; capital Karakorum) and Toluy (ancestral Mongolia). The word ulus did not at first mean a fixed territory. Sons were to rule collectively, with each prince's troops (tama) in every ulus; the quriltai decided on campaigns, plunder, pastures and succession.

4. Yam. Fresh horses and riders at regular outposts linked the empire. Nomads paid a tenth of their herds as the qubcur tax. The yam let the Great Khans watch distant regions.

5. Pax Mongolica. After the destruction, Europe and China were linked and Silk Route trade peaked. Travellers carried a safe-conduct pass (paiza in Persian, gerege in Mongolian) and merchants paid the baj tax. William of Rubruck, envoy of Louis IX, met a woman from Lorraine and a Parisian goldsmith at Karakorum in 1254.

6. After Genghis Khan. Ogodei (1227-41), Guyuk (1246-49), Mongke (1251-60). Batu campaigned in Russia, Poland and Hungary in 1236-42. Baghdad fell in 1258 (end of the Abbasid caliphate; Il-Khanid state under Hulegu). Qubilai Khan became Grand Khan in 1260; all China was conquered by 1279 and the Yuan ended in 1368. Timur (1370-1405) and Babur, who founded the Mughal empire in 1526, claimed Mongol descent.

7. Why western expansion slowed. Succession politics among the descendants of Jochi, Ogodei and Toluy; the shift of attention and forces to China in the 1260s; defeat by Egypt of a small force; and conflict between Jochids and Toluyids.

8. From plunder to administration. In the 1230s some Mongol leaders wanted to massacre north Chinese peasants and turn fields into pasture. By the 1270s Qubilai Khan appeared as a protector of peasants and cities. In the 1290s Ghazan Khan, the first Il-Khanid ruler to convert to Islam, warned commanders not to pillage peasants; his speech was probably drafted by his wazir Rashiduddin.

9. Two images. To settled peoples Genghis Khan was the destroyer; to the Mongols he was the greatest leader, who united them and gave them a new identity and an organised state. A balanced answer gives evidence for both.

Mongol Army, Ulus, Yam and Pax Mongolica: Organisation and Legacy: key facts

Decimal units
  • 10
  • 100
  • 1,000
  • 10,000 (tuman)
  • Tribal groups split across units
Army organisation.
Four ulus
JochiRussian steppes
ChaghataiTransoxiana
OgodeiKarakorum, Great Khan
ToluyMongolia
Division among sons.
Institutions
Quriltaiassembly for collective decisions
Yamcourier relay
Qubcurtenth of herds
Paizasafe-conduct pass
Bajtrade tax
Mongol terms.
Dates after 1227
1236-42Batu in Europe
1258Baghdad
1260Qubilai
1279all China
1368end of Yuan
Chronology.

How to answer Mongol Army, Ulus, Yam and Pax Mongolica: Organisation and Legacy questions

Governance answers need the Mongol term and its function.

  1. 1Name the term and give its meaning.
  2. 2Say who it served and who paid for it.
  3. 3Link it to control of a vast empire.
  4. 4Add one date or example.
  5. 5For legacy, give two images with evidence each.

Mongol Army, Ulus, Yam and Pax Mongolica: Organisation and Legacy in real life

The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

Mixing teams

Suppose a coach breaks old friend groups and mixes players into new teams, punishing anyone who switches without permission, so players feel loyal to the new team.

Which Mongol step is this like?

Try it first, then show the solutionSolution
  1. Genghis Khan split tribal groups across new units.
  2. Leaving without permission was punished.

Answer: It resembles the decimal army that broke tribal identities and created loyalty to the Khan.

Memory hook: New unit, new loyalty.

Relay delivery

Suppose parcels move between towns by relay stations with fresh couriers, each funded by a levy on local owners.

Which Mongol institution does it resemble?

Try it first, then show the solutionSolution
  1. The yam used fresh horses and riders at regular outposts.
  2. Nomads supported it with the qubcur tax.

Answer: It resembles the yam and the qubcur levy.

Memory hook: Relay and levy.

Tricks to remember Mongol Army, Ulus, Yam and Pax Mongolica: Organisation and Legacy

Short memory aids. Say each one aloud once, then use it on a question the same day.

  • JCOT

    Jochi, Chaghatai, Ogodei, Toluy

    Use it when: Four sons in age order.

  • Anda and naukar

    Anda: blood-brother; naukar: bondsman

    Use it when: Aristocracy terms.

  • Y-Q-P

    Yam, Qubcur, Paiza

    Use it when: Governance terms.

Mongol Army, Ulus, Yam and Pax Mongolica: Organisation and Legacy: solved examples

Ordered from board level to HOTS. Try each one before you open the solution.

Example 1: Tuman · 1 mark · MCQBoard level

A tuman in the Mongol army had notionally:
(A) 10 soldiers
(B) 100 soldiers
(C) 1,000 soldiers
(D) 10,000 soldiers

Try it first, then show the solutionSolution
  1. The largest unit of the decimal system (1 mark).

Answer: (D)

Example 2: Qubcur · 2 marks · Very short answerBoard level

What was the qubcur and what purpose did it serve? (2 marks)

Try it first, then show the solutionSolution
  1. A tax of a tenth of herds (1 mark).
  2. Paid by nomads to support the yam courier system (1 mark).

Answer: The qubcur was a tax of one-tenth of the herds paid by nomads to support the yam.

Example 3: Army reform · 3 marks · Short answerHarder board level

Explain how Genghis Khan's army reforms changed Mongol society. (3 marks)

Try it first, then show the solutionSolution
  1. Decimal units mixed tribal members (1 mark).
  2. Leaving a unit was harshly punished (1 mark).
  3. Loyalty shifted to the Khan; status came from closeness to him (1 mark).

Answer: He used the old decimal system but split tribes and clans across new units, so members of the same tribe no longer served together. Leaving a unit without permission was harshly punished. Identity and status came from service to Genghis Khan rather than old clan chieftainship.

Example 4: Source-based: the yam · 3 marks · Source-basedHarder board level

Read: Fresh horses and riders were kept at regularly spaced outposts. Nomads supported this relay by giving a tenth of their herds, which they paid willingly for its benefits. The speed impressed travellers and let the Great Khans keep watch over far corners of the empire.
(i) What was the yam? (1)
(ii) How was it supported? (1)
(iii) How did it help the rulers? (1)

Try it first, then show the solutionSolution
  1. (i) A courier relay (1 mark).
  2. (ii) By the qubcur, a tenth of herds (1 mark).
  3. (iii) It let the Great Khans keep watch over distant regions (1 mark).

Answer: (i) The Mongol courier system; (ii) by a tenth of the nomads' herds; (iii) rulers could watch far ends of the empire.

Example 5: HOTS: two images of Genghis Khan · 5 marks · Long answerHOTS / competency

"Genghis Khan was only a destroyer." Argue for and against this view with evidence. (5 marks)

Try it first, then show the solutionSolution
  1. For: cities razed at Nishapur, Bukhara; qanats wrecked (1 mark).
  2. For: casualty claims by chroniclers (with caution) (1 mark).
  3. Against: united the Mongols, new identity and law (1 mark).
  4. Against: yam, Pax Mongolica, trade on the Silk Route (1 mark).
  5. Conclusion: image depends on whose perspective, settled peoples or Mongols (1 mark).

Answer: Settled peoples saw him as a destroyer: Nishapur was razed, Bukhara plundered and the qanats of Iran fell into disrepair. Chroniclers' death tolls are probably exaggerated, but the damage was real. Mongols saw him as the greatest leader: he united them, gave them a new identity and a law, and his system of the yam and the peace of the Silk Route helped trade. The image therefore depends on the viewpoint of the writer.

Where students lose marks in Mongol Army, Ulus, Yam and Pax Mongolica: Organisation and Legacy

The slips examiners see most often, and what to write instead.

  • Mistake: Wrong order of the four sons

    Names are similar.

    Wrong working

    Toluy was the eldest.

    Right working

    Jochi eldest, Toluy youngest.

    Do this: Use JCOT.

    Usually costs: 1 mark.

  • Mistake: Treating ulus as a fixed territory from the start

    Modern states have borders.

    Wrong working

    Ulus meant a territory with clear borders.

    Right working

    Ulus did not at first mean a fixed territory.

    Do this: Say "initially fluid".

    Usually costs: 1 mark.

  • Mistake: One image only

    Students repeat destruction.

    Wrong working

    Genghis Khan was a destroyer.

    Right working

    Destroyer to settled peoples; greatest leader to Mongols.

    Do this: Give both with evidence.

    Usually costs: 2 marks.

Exam tips

  • Always give the Mongol term plus its English meaning.
  • Support the two images with at least two facts each.
  • Use dates for successors: 1258, 1260, 1279, 1368.

Practice questions on Mongol Army, Ulus, Yam and Pax Mongolica: Organisation and Legacy

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

  1. Q1 · 1 mark · MCQBoard level

    Which son of Genghis Khan received the Russian steppes?
    (A) Chaghatai
    (B) Jochi
    (C) Ogodei
    (D) Toluy

    Hint

    Eldest son.

    Answer

    (B) Jochi.

  2. Q2 · 2 marks · Very short answerBoard level

    The Mongols took Baghdad in 1258 and Qubilai conquered all China in 1279. How many years apart? (2 marks)

    Hint

    Subtract.

    Answer

    1279 - 1258 = 21 years.

  3. Q3 · 3 marks · Short answerHarder board level

    Distinguish between anda and naukar. (3 marks)

    Hint

    Blood-brother vs bondsman.

    Answer

    Anda were loyal followers who shared hardship with Genghis Khan and were honoured as blood-brothers; naukar were humbler freemen who became bondsmen, showing a close bond with their master. Both gained status through closeness to the Khan.

  4. Q4 · 3 marks · Short answerHarder board level

    Give three reasons why Mongol expansion towards the west slowed after the 1260s. (3 marks)

    Hint

    Succession, China, Egypt.

    Answer

    (i) Succession politics among descendants of Jochi, Ogodei and Toluy absorbed attention; (ii) growing interest in China diverted forces and supplies east, and a small force was defeated by Egypt; (iii) Jochid-Toluyid conflict on the Russian-Iranian frontier.

  5. Q5 · 4 marks · Short answerHOTS / competency

    How did Mongol attitudes towards peasants and cities change between the 1230s and the 1290s? What does it show? (4 marks)

    Hint

    Massacre plan vs Ghazan's speech.

    Answer

    In the 1230s some leaders wanted to massacre north Chinese peasants and convert fields to pasture. By the 1270s Qubilai appeared as a protector of peasants and cities, and in the 1290s Ghazan Khan warned commanders against pillaging peasants. It shows a move from plunder to administration as the Mongols ruled settled societies.

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

  1. 1.Who built a capital at Karakorum?Show answer

    Ogodei.

  2. 2.What was the paiza?Show answer

    A safe-conduct pass for travellers.

  3. 3.Who was the first Il-Khanid ruler to convert to Islam?Show answer

    Ghazan Khan.

  4. 4.When did the Yuan dynasty end?Show answer

    1368.

Mongol Army, Ulus, Yam and Pax Mongolica: Organisation and Legacy: frequently asked questions

Who were the noyan?

Specially chosen captains who led units.

Why was the quriltai important?

It took collective decisions on campaigns, plunder, pastures and succession.

Who founded the Mughal empire?

Babur, a descendant of Timur and Genghis Khan, in 1526.