Original: The Battle of Baghdad in 1258 was a key event in world history in which the Mongols under Hulagu Khan, a grandson of Genghis Khan, destroyed Baghdad, the capital of the Abbasid Caliphate and at the time the greatest center of Muslim power.
Simplified: The Battle of Baghdad in 1258 was a victory for the Mongol leader Hulagu Khan, a grandson of Genghis Khan.