A medieval Bulgar state controlling Volga-Kama trade routes in what is now European Russia, founded by Bulgar tribes descended from Old Great Bulgaria's dispersal after 668; converted to Islam in 922 and conquered by the Mongols in 1236-1241, after which it became part of the Golden Horde.
Conquered by the Mongols (1236-1241) and absorbed into the Golden Horde (Ulus Jochi).
The atlas holds 4 border frames for Volga Bulgaria — the shape you scrub through changes in 830 · 950 · 1050 · 1150.
Places Volga Bulgaria within the broader Turkic-world context, including its Islamization and eventual Mongol conquest.