"Foremost amongst the defenders of mankind are the Space Marines of the Adeptus Astartes, the greatest of the God-Emperor's soldiers. They are barely 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 rigorous training. Space Marines are untouched by plague or any natural disease and can suffer wounds that would kill a lesser being several times over, and live to fight again. Clad in Power Armour and wielding the most potent weapons known to man, the Space Marines are terrifying foes and their devotion to the Emperor and the Imperium of Man is unbreakable. They are the God-Emperor's Angels of Death, and they know no fear. "