奥列格
The other Severians had as neighbors the Radimichs, Krivichs, and Vyatichs in the north and the Derevlians and Polianians in the west. Those tribes had to pay tribute to the Khazars in 859 in the form of squirrel and beaver skins, which suggests they lived in or near the northern forests. In 884, Oleg of Novgorod annexed their territory to the Kievan Rus'. The Severians had to pay a "light tribute." According to Oleg, he had acted not against the Severians but against the Khazars. It is possible that the Severians accepted Oleg's rule because he imposed lower taxes on them.