 In the 3rd to 4th centuries AD a semi-legendary Gothic kingdom of Oium existed in Southern Russia until it was overrun by Huns.Between the 3rd and 6th centuries AD, the Bosporan Kingdom, a Hellenistic polity which succeeded the Greek colonies, was also overwhelmed by nomadic invasions led by warlike tribes, such as the Huns and Eurasian Avars.A Turkic people, the Khazars, ruled the lower Volga basin steppes between the Caspian and Black Seas until the 10th century.