 The Nayman Nestorian Christian Küchlük usurped the throne of the Kara-Khitans.In 1211, a Mongol detachment under the command of Khubilai Noyon, one of Genghis Khan's generals, appeared in the northern part of Zhetysu.Arslan-khan Karluk killed the Karakhitay governor of Kayalik and proclaimed his loyalty to Genghis Khan.