Oleg of Drelinia
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Oleg was the ruler of Drelinia, a region which is today in the western Ukraine.
He was the son of Sviatoslav I of Kiev. Sviatoslav split up his domains, and gave Drevlinia to Oleg. Oleg and his brother Yaropolk went to war after their father's death. This war eventually resulted in Oleg's defeat and the reunification of his lands with Kiev.

