Władysław III of Poland
In 1423–24 the Hungarian-Polish relations were characterized relatively good. Though in 1429–30 Sigismund made efforts to alienate Władysław II Jagiełło king of Poland and Lithuanian Grand Duke Vytautas, but after the death of Vytautas, the ground of collision vanished. In May 1438 the situation changed when the Czech estates elected Albert (Hungarian and German King) King of Bohemia, while the Utraquists voted for the subsequent Polish King Casimir IV of Poland. In July a war broke out between King Albert and Polish King Władysław III of Poland that lasted until 4 January 1439, when a truce put an end to it in Breslau.