Dagor Dagorath was the priphesied final battle, of Ambar. 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 would brought about by an Ainur who served Morgoth and bides his time to learn the secrets of releasing him from the Void. Gilthrang as this Ainu was known by, was said to be an equal to Sauron with the one ring. Together with Morgoth and Sauron, Gilthrang will lead the forces of evil in an attempt to destroy the forces of good. It was also stated that the Númenórians under Ar-Pharazon will fight under Morgoth as well, being released from the caves of the Forgotten

Eventually Morgoth will be defeated by Tulkas and be thrown to the ground, while on the ground--Túrin Turambar will stab him in the heart with the reforged Gurthang for all the evils done unto men. The rest of the evil warriors will be destroyed by the combination of the Valar, Maiar, Men, Elves, Dwarves, Eagles, Ents, Huorns, lesser good spirits and anything else that is good and noble. They all will fight under the banner of Eru Illuvatar.

The following is a list of commanders. If a character is not listed it doesn't mean they were not at the battle, but they were most likely not the highest commander. 

The Dark Side List of Commanders

Light Side List of Commanders

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