<P> In the fiction of J.R.R. Tolkien, "Easterling" and "Easterlings" were generic terms for Men who lived in Rhûn, the vast eastern region of Middle - earth . Many fought under Morgoth and his successor Sauron, the Dark Lords of Middle - earth . </P> <P> The race of Men awoke in the East of Middle - earth in the First Age; the races of Elves and Dwarves had already been awake for millennia . Some tribes of Men soon migrated to the west of Middle - earth; they were the ancestors of peoples such as the Edain of Beleriand . But many Men remained in the East, or did not migrate until much later; they are known as the Easterlings . </P> <P> During the First Age, the term Easterlings was applied to the Swarthy Men who came from the east and went into Beleriand in Y.S. 463 . They were of different tribes, which were sometimes on the edge of strife . They were generally described as "short and broad...strong...their skins were swart or sallow, and their hair was as dark as their eyes". Some were of the same ethnic stock as the Forodwaith and later men of Lossoth . The most powerful of their chieftains were Bór and Ulfang, and the Sons of Fëanor made alliance with them . </P> <P> The people of Bór proved to be faithful, but were completely destroyed during the Nírnaeth Arnoediad, fighting on the side of the Eldar and Edain . But the followers of Ulfang and his son Uldor, the Accursed, were already in league with Morgoth before their coming, and betrayed the Elves and Men of the West to their defeat during the Battle of Unnumbered Tears in what was later known as the Treachery of Men . </P>

Who is the army that marched into mordor