The Battle of 13th City took place in 13th City, the capital city of the En'rg-ch Empire. While the main forces of the Empire and the Galactic Republic took action against each other, a Jedi Master managed to enter the En'rg-ch Castle. In the castle, the Master engaged Kaxs I in a lightsaber duel, ending with Kaxs I being stabbed in the heart.
The battle, and the death of Kaxs I, marked the end of the En'rg-chan Colonist War and the beginning of the En'rg-chan Civil War.