Kumun Buqa

Kumun Buqa was a Borjigin prince, the second son of Belgutei and a nephew of Genghis Khan. He campaigned against the Jin with Ögedei Khan, and in spring 1232 crossed the Yellow River to join Tolui's army at the Battle of Sanfengshan, where the Mongols destroyed the pick of the Jin forces and captured General Yila Pu'a.

From 1235 he led armies against the Southern Song, taking several cities including Zaoyang and Huangzhou. Chinese literati praised him as a disciplined commander who spared the populace.