Question

Каким образом Олег объединил два государственных центра

Answer 1

Каким образом? Совершил в 882 году военный поход на Киев, захватил его и сказал: "Да будет Киев матерью городов русских!". Таким образом в его власти был как Новгород, так и Киев. 

Answer 2

How Oleg United Two State Centers

Oleg, also known as Oleg the Prophet, was a Varangian prince who ruled over the Rus' people and is credited with the establishment of the Kievan Rus' state. He is known for uniting two state centers, which is a significant event in the history of Eastern Europe.

Oleg united the two state centers, Novgorod and Kiev, through a series of strategic military and political maneuvers. In 882, Oleg conquered Kiev and made it the capital of his realm, thus consolidating his power and influence over the region. This marked the beginning of the prominence of Kiev as a political and cultural center in Eastern Europe.

Oleg's unification of the two state centers was a pivotal moment in the history of the Kievan Rus' and laid the foundation for the subsequent development of the Rus' state.