After Kubrat's death, his empire was divided when his appointed heir Batbayan submitted to the Khazars of Kubrat's second son Kotrag who settled Batbayan's army at the confluence of the Volga and Kama rivers where they founded a Khanate known as Volga Bulgaria.
His empire was divided. This was after Kubrat's death. His appointed heir Batbayan submitted to the Khazars of Kubrat's second son Kotrag. These Khazars of Kubrat's second son Kotrag settled Batbayan's army at the confluence of the Volga and Kama rivers. They founded a Khanate. This Khanate was known as Volga Bulgaria.