[7] Uthman led a policy of maneuvering between the Qara Khitai and the Khwarezmshah Muhammad b. Tekish.

He bore a high Turkic title (ulug sultan as-salatin).

After the recognition of the power of the Khwarezmshahs by Uthman, other Karakhanids who ruled in Ferghana followed his example.

Uthman married the daughter of Khwarezmshah Muhammad b. Tekish and went to live in Khwarezm.

[9] In 1212 Muhammad b. Tekish invaded the Kara-Khanid Khanate, conquered Samarkand, and massacred the entire population.