The following is a list of tribes who lived on the territories of contemporary Belarus, Russia, and Ukraine. The tribes were later replaced or consolidated by Slavs, starting with the formation of Kievan Rus', including the semi-autonomous principalities of the Grand Duchy of Lithuania, that existed in the first half of the second millennium. The area was later expanded to become the Tsardom of Russia, followed by the Russian Empire, which became part of the Soviet Union.