Battle of Stable Hill

The Battle of Stable Hill, commonly known as the Last Battle, was the ultimate fight to occur in the world of Narnia.

It took place during the Calormene Conquest and was not an obvious victory to either side (the Calormene Army and Narnian Army) because the world came to an end in the very midst of the battle, destroying both sides and sending those deservant of an eternal afterlife of happiness to Aslan's Country.

Books
The Last Battle