The Battle of Kahlenberg took place on September 12, 1683, near Vienna, Austria. It was a significant conflict during the Great Turkish War, where the forces of the Holy Roman Empire, led by King Jan III Sobieski of Poland, faced the invading Ottoman Empire. The battle was crucial in halting the Ottoman siege of Vienna, which had been ongoing since July 1683. The victory at Kahlenberg marked a turning point in the war, leading to the eventual decline of Ottoman power in Europe. The combined forces of the Holy League, which included troops from various European nations, successfully repelled the Ottomans, ensuring the safety of Vienna and boosting morale across Europe.