The Mongol invasion of Central Asia occurred after the unification of the Mongol and Turkic tribes on Mongolian plateau in 1206. It finally completed when Genghis Khan conquered the Khwarizmian Empire in 1221.
Driven from China by the Jurchen Jin Dynasty, in 1124 some Khitans moved westward under Yeh-lü Ta-shih’s leadership and created the Kara khitan (Black Khitai, or...