Complex sentence: In 1526, at the Battle of Mohács, the forces of the Ottoman Empire annihilated the Hungarian army, and in trying to escape Louis II of Hungary drowned in the Csele Creek.
Split into simpler sentences: In 1526, at the Battle of Mohács, the forces of the Ottoman Empire annihilated the Hungarian army. In trying to escape Louis II of Hungary drowned in the Csele Creek.