Władysław had to wait until Vytautas finally died without an heir in 1430 to exercise his power over the Lithuanian succession, when he made the mistake of choosing his troublesome brother Švitrigaila as the new grand duke of Lithuania. Within two years Švitrigaila rebelled and, like Vytautas before him, sought to break away from Polish overlordship and reign as an independent grand duke of Lithuania. Władysław was obliged to replace him with Vytautas's brother Žygimantas, whom he ordered to restore the union by force. The struggle over the Lithuanian succession was to continue long after Władysław's deathStone, p 11; Plokhy, p 98 culminating with the Battle of Wiłkomierz.
