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Siege of Otrar

1219 · Otrar (on the Syr Darya, in present-day southern Kazakhstan) · World · Medieval

After a siege of about five months Otrar's outer city fell; the inner city held out for about another month before it was stormed, and Inalchuq was captured and executed.

Belligerents

Mongol Empire

Commanders
Chagatai, Ögedei
Strength
Tens of thousands (part of Genghis Khan's Western Campaign army)

Khwarazmian Empire

Commanders
Inalchuq (Ghayir Khan)
Strength
Garrison of tens of thousands (sources vary)

Background

In 1218 Inalchuq, governor of Otrar, killed several hundred members of a caravan sent by Genghis Khan and seized their goods, and the Khwarazm-Shah Muhammad then killed the Mongol envoys sent to negotiate. In the autumn of 1219 Genghis Khan personally led a great army on his Western Campaign.

Course of the battle

  1. Dividing forces to encircleGenghis Khan left Chagatai and Ögedei to besiege Otrar and led his main force straight for Bukhara.
  2. Prolonged siegeKnowing his guilt was grave, the garrison commander dared not surrender and held out for about five months.
  3. Outer city fallsSome of the defenders who left the city to surrender were killed, and the Mongol army broke into the outer city.
  4. Citadel fallsInalchuq held the inner citadel with the remnants of his force for about another month until it too fell; he was taken to Genghis Khan and executed.

Outcome at a glance

Date1219
PlaceOtrar (on the Syr Darya in today's southern Kazakhstan)
ResultAfter a siege of about five months Otrar's outer city fell; the inner city held out for about another month before it was stormed, and Inalchuq was captured and executed.
WinnerMongol Empire
CasualtiesMost of the garrison was killed in battle or put to death, and the city was severely damaged; no precise figures.
Territorial changeThe Mongols broke the Syr Darya defense line and immediately divided their forces to attack Bukhara, Samarkand and elsewhere, and the Khwarazmian Empire quickly collapsed.

Impact

The Otrar incident and the siege that followed marked the start of the first great Mongol Western Campaign; the famous cities of Central Asia then fell one after another, reshaping the course of Eurasian history.

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