During the Mongol invasion of Volga Bulgaria, the steppe-dwelling Suar migrated north, where Volga Finnic tribes, such as the Mordvins and Mari lived. The Chuvash claim to be the descendants of these Suars who assimilated with the Mari. In 1242, they became vassals of the Golden Horde. Later Mongol and Tatar rulers did not intervene in local internal affairs as long as tribute was paid annually to Sarai. When the power of the Golden Horde began to diminish, local Mişär Tatar Murzas from Piana and Temnikov tried to govern the Chuvash area.