The Yaropolk of Kiev reference article from the English Wikipedia on 24-Apr-2004
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Yaropolk of Kiev

Varangian Prince Yaropolk was given Kiev by his father Sviatoslav I and ruled it from 972-980. After Sviatoslav's death however, civil war soon began between Yaropolk and his brothers. In 980 Yaropolk was defeated by his brother Vladimir in 980 and lost his throne.

Preceded by:
Sviatoslav I
Rulers of Kievan Rus Succeeded by:
Vladimir I