The Ring Heroes ( Galadriel and Sauron) became recruitable.Goblins: Fire Drake brood (a group of three smaller Fire Drakes), Azog of Moria.Isengard: Warg Pack, Uruk Deathbringers.Mordor: Black Orcs, Black Riders (together as a unit of 6, on horseback), Haradrim Lancers.Elves: Lindon Horse Archers, Noldor Warriors.Men of the West: Rohan Spearmen, Knights of Dol Amroth.
Unlike BFME 2, there is only one Campaign, in which the player plays the conquest of the Witch-king and his faction. The campaign of The Rise of the Witch-king is of the story before and during the war that the Witch-king was to wage between Angmar and Arnor, before Sauron returned openly to Mordor.