In 1211, after the conquest of Western Xia, Genghis Khan mobilized an army to conquer the Jin dynasty. His general Jebe and brother Qasar were ordered to reduce the Jurchen cities in Manchuria. They successfully destroyed the Jin forts there. The Khitans under Yelü Liuge declared their allegiance to Genghis Khan and established nominally autonomous state in Manchuria in 1213. However, the Jin forces dispatched a punitive expedition against them. Jebe went there again and the Mongols pushed out the Jins.