sentences:  After Genghis Khan's death in 1227, his empire was divided by his descendants into four sections or Khanates, which degenerated into civil war.The northwestern Kipchak Khanate, known as the Golden Horde, expanded towards Europe, primarily via Hungary and Poland, while its leaders simultaneously opposed the rule of their cousins back at the Mongol capital.The southwestern section, known as the Ilkhanate, was under the leadership of Genghis Khan's grandson Hulagu.