Yaropolk I of Kiev was the Grand Prince of Kiev, ruling from 972 to 978. As the eldest son of Sviatoslav I, he initially held Kiev while his father campaigned, but his reign was defined by a violent civil war against his brothers. Following the death of his father, Yaropolk fought his brother Oleg and eventually became the sole ruler of the Rus' lands. His rule ended in 978 when his brother Vladimir seized power, leading to Yaropolk's death in an ambush.