Siege of Kozelsk

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Defense Of Kozelsk
Part of the Mongol invasion of Kievan Rus'
Date March–May 1238 Location Kozelsk Result Mongol victory Razing of Kozelsk
Belligerents
Principality of Chernigov	Mongol Empire
Commanders and leaders
Prince Vasili	Batu Khan Subutai
Units involved
[data missing]	[data missing]
Strength
The entire population of the city	On the last day of the siege: 4,000

The siege of Kozelsk was one of the main events of the Western (Kipchak) March of the Mongols (1236–1242) and the Mongol invasion of Kievan Rus' (1237–1240) at the end of the Mongol campaign in northeastern Kievan Rus' (1237–1238). The Mongols laid a siege in the spring of 1238 and eventually conquered and destroyed the town of Kozelsk, one of the subsidiary princely centers of the Principality of Chernigov.