Dagor Dagorath was the last battle, or Middle Earth's Armageddon if you will. Here all the evil that was sent to the Void would break loose upon the world. Spiders, Dragons, Demons, Orcs, Undead, Elves, Men, Dwarfs, Serpents, Trolls, Ogres, Giants, Wargs, Vampires, Werewolves, and anything else that was evil came forth under the command of Morgoth. This is brought about by an Ainur who serves Morgoth and bides his time to learn the secrets of releasing him from the Void. Gilthrang as this Ainu is known by, was said to be an equal to Sauron with the one ring. Together with Morgoth and Sauron, Gilthrang led the forces of evil in an attempt to destroy the forces of good. It was also stated that the Numenorians under Ar-Pharazon would fight under Morgoth as well, being released from the caves