Military and social reorganisation

Detail

The steppe starting point — everyone is a soldier

• On the steppe, all able-bodied adult males bore arms. There was no separate class of soldiers. A herder was also a fighter.
• This meant a nomad chief could put a whole people into the field. Farming states could not do this. They had to pay and feed a standing army.
• Conquest changed the make-up of Genghis Khan's army. It became an "incredibly heterogeneous mass" — a very mixed body of people.
• Some joined willingly, like the Turkic Uighurs.

• Some were beaten first and then taken in, like the Kereyits.

• So the army grew faster than the Mongol tribe itself. Most soldiers were not ethnic Mongols.

Decimal reorganisation — breaking the tribe

• Genghis Khan grouped his men in units of 10, 100, 1,000 and (notionally) 10,000. The 10,000 unit was called a tuman. "Notionally" means the number was the official size on paper, not always the real count.
• The decimal system itself was old — steppe armies had used it before him. The decimal form of 10 / 100 / 1,000 / 10,000 was already in use among steppe peoples by the 13th century [2].
• Genghis Khan's new step: he stopped clan and tribe from staying together inside a unit.
• Old tribal groups were broken up.
• Their members were spread across new units.

• Leaving your allotted group without permission brought harsh punishment.

• A single tuman mixed people from many tribes. A man now ate, rode and fought beside strangers.

• Result: old tribal identity was erased. A new identity came from Genghis Khan himself — you were his soldier, not your clan's man.
• Britannica records the same method: instead of taking over defeated tribal war bands as they were, Genghis reorganised beaten foes into tens and hundreds and put his own men in command of each unit [2].
• Commanders of large units were given territories. From these they drew tribute for the supreme khan and raised their quota of troops [2].

A new aristocracy — loyalty, not birth

• Contingents were placed under his four sons and under captains he chose himself, called noyan.
• Close companions were honoured in two ways:
• blood-brothers (anda) — the highest bond of trust, sworn friendship treated as kinship;

• bondsmen (naukar) — servants of the khan, ranked but bound to him.

• The rule of status changed. Rank came from closeness to the Great Khan, not from old chiefly rights of birth.

• Britannica notes Genghis's generals were his own sons or men he picked, absolutely loyal to him, and that a career was open to talent — an ordinary tribesman could rise to command 10,000 men [2].
• Britannica also notes the Mongol military hierarchy had no political or administrative counterpart — the army was the organised part of the state, not the civil office [2].

The military machine — speed, bow and winter

• Horsemanship: Mongol and Turkic riders gave the army great speed and mobility. Each man could ride long distances with spare mounts.
• Archery: rapid-shooting mounted archery was the key skill — shooting fast from a moving horse.
• It was practised in hunting expeditions.

• These hunts doubled as field manoeuvres — practice for the real battle: surround, drive, close in.

• Winter campaigning: the cavalry travelled light. They could fight in the depths of winter, and used frozen rivers as highways into enemy land. Rivers that blocked armies in summer became roads in winter.

• Weakness and its cure: steppe cavalry was conventionally weak against fortifications — walled cities.
• Genghis Khan quickly took up siege engines and naphtha bombardment (naphtha = a burning oil thrown at walls and roofs).

• His engineers built light portable equipment that could travel with a fast army. This was used to devastating effect.

• Effect on cities: during 1220–21 Bukhara, Samarkand, Herat, Tus and Nishapur were razed and populations slaughtered [3].

• Merv was destroyed by the Mongols in 1221. The city and its irrigation system were rebuilt in the 15th century, but it never regained its old prosperity [4].
• Nishapur's great period ran from the 9th century to 1221, when — after repeated earthquakes and military occupations — the Mongols devastated it [5].

Note: NCERT dates the Nishapur massacre to 1220 and Herat to 1222; Britannica places the Khwarazm razings in the 1220–21 campaign and Merv's and Nishapur's destruction in 1221 [3][4][5]. Keep the NCERT dates for the exam.

The destruction — and how the numbers were inflated

This is the chapter's source-criticism case — checking whether a source can be trusted.

• Chroniclers' massacre figures are staggering:
• Nishapur (1220) — 1,747,000
• Herat (1222) — 1,600,000
• Baghdad (1258) — 800,000

• Nasa — 70,000; Baihaq — 70,000; Tun — 12,000

• Juwaini's Merv figure — 1,300,000. How he got it: counting went on for thirteen days, at 100,000 corpses a day. Thirteen days at a lakh a day is an arithmetic guess, not a headcount.

• The Bukhara test:
• An eyewitness report says 400 soldiers defended the citadel of Bukhara.
• A later Il-Khanid chronicle claims 30,000 killed there.

• The gap between 400 and 30,000 cannot be an error of counting. It is a deliberate swelling of the figure.

• Why inflate? The successors of Genghis Khan ruled over conquered peoples. A terrifying memory of the founder made rebellion look hopeless. Exaggeration served the politics of memory of the successor states (see §8).

• Exam takeaway: the destruction was real and huge; the figures are literary and political, not statistical.

Prelims Hooks

• The Mongol unit of 10,000 soldiers was called a tuman; the full decimal ladder was 10, 100, 1,000, 10,000.
• The decimal system was not Genghis Khan's invention — his innovation was ending the coexistence of clan and tribe inside a unit.
• Leaving one's allotted unit without permission carried harsh punishment.
• Noyan = a captain/commander chosen by Genghis Khan; anda = blood-brother; naukar = bondsman.
• Contingents were placed under Genghis Khan's four sons and his chosen noyan.
• The Uighurs (Turkic) joined willingly; the Kereyits were defeated enemies who were absorbed.
• Mongol archery practice took place in hunting expeditions used as field manoeuvres.
• Mongol cavalry campaigned in winter, using frozen rivers as highways.
• Genghis Khan adopted siege engines and naphtha bombardment; his engineers made light portable siege gear.
• Massacre figures: Nishapur 1,747,000 (1220), Herat 1,600,000 (1222), Baghdad 800,000 (1258), Merv 1,300,000 (Juwaini).
• Juwaini's Merv figure = 13 days × 100,000 corpses a day.
• Bukhara citadel: eyewitness says 400 defenders; Il-Khanid chronicle claims 30,000 killed.
• Merv destroyed 1221; rebuilt with its irrigation system in the 15th century but never recovered its prosperity [4].
• Bukhara, Samarkand, Herat, Tus and Nishapur were razed during 1220–21 [3].

Mains Points

• Military reform was social engineering. Splitting clans across tumans destroyed the tribal base of rival chiefs. The army became the state's only real structure, and loyalty ran straight to the Great Khan. Britannica's point that the military hierarchy had no political or administrative counterpart strengthens this — the Mongol state was an army first [2].
• Mobility over mass. Speed, mounted archery, remounts, winter marches on frozen rivers and light portable siege gear beat larger, slower, settled armies. Borrowing siege engines and naphtha from settled societies shows nomads were not closed systems — they absorbed the technology of the people they fought.
• Meritocracy inside a conquest state. Status came from closeness to the khan, and a common tribesman could command 10,000 men [2]. Compare with the birth-based nobility of contemporary settled states, including the Delhi Sultanate's contests over khuts and muqtis.
• Source criticism is the chapter's real lesson. The massacre figures (1,747,000 at Nishapur; 400 versus 30,000 at Bukhara) show how chronicles written under the successors shaped memory for political use. Useful in any GS-I answer on the reliability of medieval sources — accept the scale of destruction, reject the arithmetic.