アストラハン・ハン国
Despite the domestic turmoil of the 1530s and 1540s, Russia continued to wage wars and to expand. It grew from 2.8 to 5.4 million square kilometers from 1533 to 1584. Ivan defeated and annexed the Khanate of Kazan on the middle Volga in 1552 and later the Astrakhan Khanate, where the Volga meets the Caspian Sea. These victories transformed Russia into a multiethnic and multiconfessional state, which it continues to be today. The tsar now controlled the entire Volga River and gained access to Central Asia.