Chaos Space Marines
Space Marines are the most powerful and dreaded of all the human warriors in Warhammer 40,000. They are not Human at all but superhuman, having been made superior, in all respects, to a normal man by a harsh regime of genetic modification, psycho-conditioning and rigourous training. Being few in number compared to the uncounted billions of Humanity, Space Marines are organised into small independent armies called Chapters. Each Chapter is responsible for its own recruitment, training, equipment, organisation and strategy. Their unswerving loyalty is to the Emperor of Mankind and no other.
Here is a few example of Chaos Space Marines:
Emperor's Children: Loyal Inquisitors train for decades to steel themselves against the temptations of the Slaanesh; in order to combat this seductive, deadly threat to Imperial order. Yet, long ago, these agents of Chaos were counted among the servants of Mankind; indeed, they once were the most devoted warriors of the Emperor...
World Eaters: Of all the Space Marine Legions created by the Emperor to reconquer the galaxy during the Great Crusade, none were more feared than the World Eaters. At the forefront of the bloodiest assaults and most vicious battles, the name of World Eaters became a byword for bloodshed and terror on a horrifying scale.
Death Guard: The Death Guard Legion has become a relentless and terrifying scourge upon the Imperium of Man. But it was not always so. Ten millennia ago, the Death Guard was one of the original twenty Space Marine Legions, united in the defence of Mankind under the command of the Emperor and their fearsome Primarch, Mortarion.