Complex sentence: In 1410 he took part in the battle of Grunwald against the Teutonic Order, after the battle he proposed a peace treaty between the Polish King Jagiełło and the Hungarian King Sigismund of Luxembourg (the 1411 treaty of Lubowla).
Split into simpler sentences: In 1410 he took part in the battle of Grunwald against the Teutonic Order. After the battle he proposed a peace treaty between the Polish king Jagiełło and the Hungarian King Sigismund of Luxembourg (the 1411 treaty of Lubowla).