It is unclear when people other than the Brodnici and Berladnici (which had a Romanian origin with large Slavic influences) began to settle in the lower reaches of major rivers such as the Don and the Dnieper after the demise of the Khazar state.Their arrival was probably not before the 13th century, when the Mongols broke the power of the Cumans, who had assimilated the …

哥薩克（烏克蘭語： Козаки́ ，羅馬化：Kozaky；俄語： Казаки ，羅馬化：Kazaki） ，即哥薩克人，是一支起源於東歐大草原、主要為东斯拉夫 信仰東正教的多族裔背景社羣 。 主要聚居於第聶伯河、頓河、烏拉爾河及捷列克河等東歐河流流域沿岸，並對烏俄兩國的歷史發展影響深遠 。