I want to know the answer to the following question:
Who populated the area between the Baltic Sea and the Black sea before Kievan Rus?
All the background I'm provided with is that "In the south, in the area around Kiev, were the Poliane, a group of Slavicized tribes with Iranian origins, the Drevliane to the west of the Dnieper, and the Severiane to the east.". Is that enough to answer the question?