"Campaigns initiated in his lifetime include those against the Qara Khitai, Khwarezmia, and the Western Xia and Jin dynasties, and raids into Medieval Georgia, the Kievan Rus', and Volga Bulgaria. These campaigns were often accompanied by large-scale massacres of the civilian populations, especially in the Khwarazmian- and Western Xia–controlled lands. Because of this brutality, which left millions dead, he is considered by many to have been a brutal ruler"