Sviatoslav I, Tsar of Russia

Svaitoslav I Igorevich (943 - 26 March 972) was the son of Igor and Olga I, and the paternal grandson of Rurik. He was famous for his campaigns that resulted in the collapse of Khazaria and the First Bulgarian Empire. He conquered several East Slavic tribes, defeated the Alans and attacked the Volga Bulgars. His death resulted into a fratricidal feud between his three sons, resulting in two of sons to be killed and his first son taking over his incomplete empire before his youngest son took over from his eldest.