Jalal ad-Din
Through the ruler of Alamut, the Mongols learned that Jalal ad-Din was weakened by a recent defeat. Ögedei Khan sent a new army of 30,000 men under the command of Chormagan and the Khwarazmians were swept away by the new Mongol army. In the winter of 1231, in the ensuing confusion the Mongols arrived into Azerbaijan from the direction of Khorasan and Rayy. The 30,000 strong Mongol army led by Chormagan easily defeated Jalal ad-Din and occupied northern Iran. Khwarazmshah retreated to Ganja, Azerbaijan. The Mongols followed him and captured Arran. Jalal ad-Din took refuge in the Mayyafarikin mountains and there in August of that year he was killed by an unknown Kurd, allegedly employed by the Seljuks.