Many different tribes lived on the territory of modern Ukraine since pre-historical times. Most historians believe that the Great Steppe at the North of the Black Sea was a homeland of all Indo-European and Indo-Iranian languages. Some believe it was also a birthplace of the whole Caucasian race. Wends, Goths, Huns, Sclaveni, Avars and other tribes and tribal groups fought among themselves, joined unions, terminated and assimilated each other.