In J. R. R. Tolkien's novel The Lord of the Rings, the Battle of the Pelennor Fields [pɛˈlɛnnɔr] 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. It took place at the end of the Third Age in the Pelennor Fields, the townlands and fields between Minas Tirith and the River Anduin.