Khanate of Khiva
After the Bolshevik seizure of power in the October Revolution, a short-lived Khorezm People's Soviet Republic (later the Khorezm SSR) was created out of the territory of the old Khanate of Khiva, before in 1924 it was finally incorporated into the Soviet Union, with the former Khanate divided between the new Turkmen SSR, Uzbek SSR and Karakalpakstan ASSR (initially part of Kazakh ASSR as Karakalpak Oblast).