The intervention in the Kievan succession crisis of 1015–1019 by the Polish ruler Bolesław Chrobry was an episode in the struggle between Sviatopolk I Vladimirovich ("the Accursed") and his brother Yaroslav ("the Wise") for the rulership of Kiev and Kievan Rus'. It occurred when Sviatopolk's father-in-law Bolesław, ruler of Poland, intervened on Sviatopolk's behalf.