Prior to the invasion Attack , war Hostile_encounter with the Khwarazmian dynasty and the usurpation of power by the Naiman prince Kuchlug had weakened Cause_change_of_strength the Qara Khitai .

When Kuchlug besieged Besieging Almaliq , a city belonging to the Karluks , vassals of the Mongol Empire , Genghis Khan dispatched Sending a force under command Control of Jebe to pursue Kuchlug .

When Kuchlug besieged Besieging Almaliq , a city belonging to the Karluks , vassals of the Mongol Empire , Genghis Khan dispatched Sending a force under command Control of Jebe to pursue Kuchlug .

After his force of 30,000 was defeated Conquering by Jebe at the Khitan capital Balasagun , Kuchlug faced Confronting_problem rebellions over his unpopular rule , forcing Causation him to flee Escaping to modern Afghanistan , where he was captured Conquering by hunters in 1218 .

The hunters turned Becoming Kuchlug over to the Mongols , who beheaded Killing him .