Oleg is not known at birth. In 879 Oleg became the chief of the Novgrod Principality.
Oleg is a great warrior. Oleg first fought against the Severyan's. And Oleg won this war. Oleg tried to prevent the empowerment of the Caspian state. Because of this, Oleg prevented Khazars giving taxing from the Severyan's.
Oleg then started a war against Byzantium. And despite the death of too many soldiers, Oleg won this battle. And Oleg has received a high amount of compensation from the Byzantine Empire.
Oleg died in 913.