The Mongol invasion of Volga Bulgaria lasted from 1223 to 1236.
The Bulgar State, centered in lower Volga and Kama, is the center of the fur trade in Eurasia throughout most of its history.
Before the Mongol conquest, Russians of Novgorod and Vladimir repeatedly loot and attack the area, thereby weakening the Bulgar state's economy and military power.
The latter ambush the Mongols in late 1223 or in 1224.
Several clashes occur between 1229–1234, and the Mongol Empire conquers the Bulgars in 1236.
