Siege of Diaoyucheng

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Siege of Diaoyu Castle
Part of the Mongol conquest of the Song dynasty
Diaoyu Castle in the year of 2006.
Date February 1259–August 1259 Location Hechuan, Chongqing, China Result Song victory
Belligerents
Mongol Empire	Southern Song
Commanders and leaders
Möngke Khan † Wang Dechen †	Wang Jian Zhang Jue
Strength
100,000+	20,000–30,000

The siege of Diaoyucheng, alternatively the siege of Diaoyu Castle, was a battle between the Southern Song dynasty and the Mongol Empire in 1259.^[1] It occurred at the Diaoyu Fortress in modern-day Hechuan District, Chongqing, China. Möngke Khan, the fourth khagan of the Mongol Empire, lost his life in this battle, making it the only battle where the Mongols lost their khagan during their campaigns of conquest. This battle was preceded by the siege of Baghdad in 1258. The siege of Diaoyucheng was a setback for the Mongol conquest.