The Battle of Varna took place on 10 November 1444 near Varna in what is today eastern Bulgaria. The Ottoman army under Sultan Murad II defeated the Crusaders commanded by King Władysław III of Poland and Hungary, John Hunyadi and Mircea II of Wallachia. It was the final battle of the unsuccessful Crusade of Varna, a last-ditch effort to prevent further Ottoman expansion into the Balkans.