Crusade against the Lithuanians
Vilnius, LithuaniaLouis joined a crusade against the pagan Lithuanians in December 1344. The crusaders – including John of Bohemia, Charles of Moravia, Peter of Bourbon, and William of Hainaut and Holland – laid siege to Vilnius. However, a Lithuanian invasion of the lands of the Teutonic Knights forced them to lift the siege. Louis returned to Hungary in late February 1345.