Battle of the Pelennor Fields
The Battle of the Pelennor Fields ([pɛˈlɛnnɔr]), in J. R. R. Tolkien's novel The Lord of the Rings, was the defence of the city of Minas Tirith by the forces of Gondor and the cavalry of its ally Rohan, against the forces of the Dark Lord Sauron from Mordor and its allies the Haradrim and the Easterlings. It was the largest battle in the War of the Ring.
Source: Wikipedia — Battle of the Pelennor Fields (CC BY-SA 4.0)