The Battle of Slankamen (also Battle of Szlankamen in some sources) was fought near Slankamen in the Ottoman Sanjak of Syrmia (modern-day Vojvodina region, Serbia) on August 19, 1691, between the Ottoman Empire, and the forces of Austria and states of the Holy Roman Empire as part of the Great Turkish War. In August 1691, Louis William, Margrave of Baden-Baden had been able to gather an army of 50,000 and marched south to provoke the Ottomans into another major battle, similar to the Battle of Mohács (1687), after which all the lost territory could be retaken.