Is a secret Chapter made up of Marines seconded from the other Chapters. Is the Space Marine equivalent of the Men in Black: the best of the best of the Chapters’ alien slayers. Is partnered with the Inquisition but is not beholden to it (and vice versa).
Imperium
Is the Spanish Inquisition on steroids. Or ice. Or both. Roots out heresy, mutation and alien influence within the Imperium. Is as conflicted and corrupt within itself as it is brutal without.
Are complete, self-sufficient, self-contained interstellar fighting forces. Are composed of around one thousand Space Marines each, plus many more serfs. Each have their own unique character and livery.
Is the great organisation of which all Space Marines are a member. Is comprised of the thousand Space Marine Chapters. Has no hierarchy or overall leader.
Are power-armoured supersoldiers. Are warrior-monks raised from pre-pubescence to execute the toughest lightning-strike missions. Venerate The Emperor as the greatest, most powerful human being ever to live, but not as a god.
Is the greatest, most powerful human being ever to live. Created the Space Marines. Is a near-corpse kept barely alive so that interstellar travel remains possible.
Takes up two thirds of the Milky Way Galaxy. Is a futurist’s nightmare fusion of Dickens’ Industrial Revolution and Verhoeven’s Starship Troopers though a medieval, Gothic lens. Is besieged on all sides AND from within.