The Khanate of Kazan was a medieval Tatar Turkic state that occupied the territory of the former Volga Bulgaria between 1438 and 1552. The khanate covered contemporary Tatarstan, Mari El, Chuvashia, Mordovia, and parts of Udmurtia and Bashkortostan; its capital was the city of Kazan. It was one of the successor states of the Golden Horde, and it came to an end when it was conquered by the Tsardom of Russia.

Volga Bulgaria or Volga–Kama Bulgaria was a historical Bulgar state that existed between the 9th and 13th centuries around the confluence of the Volga and Kama River, in what is now European Russia. Volga Bulgaria was a multi-ethnic state with large numbers of Bulgars, Finno-Ugrians, Varangians and East Slavs. Its strategic position allowed it to create a local trade monopoly with Norse, Cumans, and Pannonian Avars.