ven though Genghis Khan was dead and the political situation in the empire was volatile, the Mongol conquests continued. A big army under Batu and Subutai invaded Russia, Ukraine, Poland, Hungary, Serbia, and Bulgaria. Meanwhile, the resurgence of the Khwarezmian empire under Jalal ad-din drew the Mongols back to Iran. This sparked a conflict with the Seljuk Sultanate of Rum that culminated in the battle of Kose Dag (Kösedağ) in 1243. Under Hulagu, the Mongols attacked the Abbasids and sacked Baghdad in 1258, but with the succession crisis looming he returned to Mongolia. His general Kitbuqa was left in the area with a smaller force and fought the battle of Ain Jalut against the forces of the Mamluk Sultanate of Egypt under Qutuz and Baybars in 1260. This battle would become the high point of the Mongol invasions in the West.
