Complex sentence: In 1596, there was a great battle where Mehmed III, a sultan of the Ottoman Empire defeated the Habsburg and Transylvanian forces at the Battle of Mezőkeresztes during which the Sultan had to be dissuaded from fleeing the field halfway through the battle.
Split into simpler sentences: In 1596, there was a great Battle of Mezőkeresztes, where Mehmed III, a sultan of the Ottoman Empire defeated the Habsburg and Transylvanian forces. During the battle the Sultan had to be dissuaded from fleeing the field halfway through the battle.