Following the Mongol invasion of Central Asia and the subsequent collapse of the Khwarezmian Empire, a Mongol force under the command of generals Jebe and Subutai advanced into Iraq-i Ajam. Jebe requested permission from the Mongolian emperor, Genghis Khan, to continue his conquests for a few years before returning to the main army via the Caucasus.

The Battle of the Kalka River was fought between the Mongol Empire, whose armies were led by Jebe and Subutai the Valiant, and a coalition of several Rus' principalities, including Kiev and Halych, and the Cumans. They were under the joint command of Mstislav the Bold and Mstislav III of Kiev. The battle was fought on May 31, 1223 on the banks of the Kalka River in present-day Donetsk Oblast, Ukraine, and ended in a decisive Mongol victory.