Ögedei Khan
Many Han Chinese and Khitans defected to the Mongols to fight against the Jin dynasty. Two Han Chinese leaders, Shi Tianze and Liu Heima (), and the Khitan Xiao Zhala (蕭札剌) defected and commanded the three tumens in the Mongol army. Liu Heima and Shi Tianze served Genghis Khan's successor, Ögedei Khan. Liu Heima and Shi Tianxiang led armies against Western Xia for the Mongols. There were four Han tumens and three Khitan tumens, with each tumen consisting of 10,000 troops. The three Khitan generals Shimo Beidi'er (石抹孛迭兒), Tabuyir (塔不已兒), and Xiao Zhongxi (; Xiao Zhala's son) commanded the three Khitan tumens and the four Han generals Zhang Rou (), Yan Shi (), Shi Tianze and Liu Heima commanded the four Han tumens under Ögedei Khan.