"Never Forget, Never Forgive! The Fallen Must Repent!"

The Dark Angels are considered among the most powerful and secretive of the Loyalist Space Marine Chapters and were the first of the original 20 Space Marine Legions to be created during the First Founding. Though they claim complete allegiance and service to the Emperor of Mankind, their actions and secret goals at times seem at odds with that professed loyalty, as the Dark Angels strive above all other things to atone for an ancient crime committed over 10,000 standard years ago against the trust of the Emperor during the time of the Great Crusade and the Horus Heresy.