Rusʹ–Byzantine War (907) in the context of "Oleg the Wise"

Oleg (Old East Slavic: Ѡлегъ, romanized: Ōlegǔ, Ольгъ, Olǐgǔ; Old Norse: Helgi; died 912), also known as Oleg the Wise, was a Varangian prince of the Rus' who became prince of Kiev, and laid the foundations of the Kievan Rus' state.

According to the Primary Chronicle, he succeeded his "kinsman" Rurik as ruler of Novgorod, and subdued many of the East Slavic tribes to his rule, extending his control from Novgorod to the south along the Dnieper river. Oleg also launched a successful attack on Constantinople. He died in 912 and was succeeded by Rurik's son, Igor.