in 1413 he had no children, while in 1432 he had two sons (Władysław III and Casimir IV). Sigismund also made territorial concessions to Poland, which received contested Podolia and part of Volhynia (except for Lutsk and Volodymyr-Volynskyi). After Sigismund's death entire Volhynia was to unconditionally pass to Poland. Aftermath In 1435 Sigismund won the decisive Battle of Wiłkomierz thus ending the Lithuanian Civil War of 1431–1435. He established himself in Lithuania and began distancing from pro-Polish policies. Sigismund took advantage of dynastic struggle between the Jagiellons and the Habsburg dynasty over the Kingdom of Bohemia in 1437–1438 and attempted to form an anti-Polish coalition with the Teutonic Knights. The plan failed and Sigismund was forced to re-confirm the Union of Grodno in 1437 and 1439. Despite the declarations, after Sigismund's murder in 1440, the Lithuanians unilaterally elected Casimir IV Jagiellon as their Grand Duke. The union between Poland and Lithuania was broken until 1447, when Casimir also became King of Poland. References 1432 in Europe 15th century in Lithuania Grodno 1430s treaties 15th century in Poland History of Grodno