Yelü Dashi, the Liao dynasty general who founded the Qara Khitai, defeats the Seljuq and Kara-Khanid forces at the Battle of Qatwan.

Yelü Dashi, courtesy name Zhongde (重德), also known by his temple name as the Emperor Dezong of Western Liao (西遼德宗), was the founder of the Western Liao dynasty. He initially ruled as king from 1124 to 1132, then as emperor and gurkhan from 1132 to 1143. He was also known in Muslim sources as Nūshī…