The Battle of Varna took place on November 10, 1444, near the city of Varna in present-day Bulgaria. It was a significant conflict between the forces of the Kingdom of Poland and the Ottoman Empire, led by King Władysław III of Poland and Sultan Murad II, respectively. The battle was part of the larger struggle to halt Ottoman expansion into Europe. The battle ended in a decisive victory for the Ottomans, resulting in the death of King Władysław III and a setback for the Christian forces. This defeat solidified Ottoman control over the Balkans and marked a crucial moment in the history of Ottoman Empire expansion in Europe.