 The Kalmyks expelled the Nogais who fled to the plains of northern Caucasus and to the Crimea under the Ottoman Empire.A few part of them joined to Kazakh Khanate as part of Little jüz.In the 18th century the basins of the Amu Darya and Syr Darya passed under the control of three Uzbek khanates claiming legitimacy in their descent from Genghis Khan.