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 of time. 

Eventually Morgoth is defeated by Tulkas and is thrown to the ground, while on the ground--Túrin Turambar stabs him in the heart with the reforged Gurthang for all the evils done unto men. The rest of the evil warriors are destroyed by the combination of the Valar, Maiar, Men, Elves, Dwarves, Eagles, Ents, Huorns, lesser good spirits and anything else that was pretty much good and noble. They all fought 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

Community content is available under CC-BY-SA unless otherwise noted.