Vsevolod's death in 1212 precipitated a serious dynastic conflict. His eldest son Konstantin gained the support of powerful Rostovan boyars and Mstislav the Bold of Kiev and expelled the lawful heir, his brother George, from Vladimir to Rostov. George managed to return to the capital six years later, upon Konstantin's death. George proved to be a shrewd ruler who decisively defeated Volga Bulgaria and installed his brother Yaroslav in Novgorod. His reign, however, ended when the Mongol hordes under Batu Khan took and burnt Vladimir in 1238. Thereupon they proceeded to devastate other major cities of Vladimir-Suzdal during the Mongol invasion of Kievan Rus'.