Turtolsky is the single moon that orbits the Industrial World of Vostroya, located in the Halo Stars near the Segmentum Obscurus. Vostroya is the homeworld of the famous Vostroyan Firstborn Imperial Guard regiments which have served the Emperor for countless centuries, though in truth they fight to absolve themselves of a terrible shame incurred by their ancestors over ten millennia ago when, during the dark days of the Horus Heresy, Vostroya refused to come to the aid of the Emperor's Loyalists or the Warmaster Horus' Traitor Legions, opting for the safety of neutrality in the galactic civil war. Like its parent world, Turtolsky is a centre of industry, providing raw materials and auxiliary manufacturing capacity for the great manufactoria of Vostroya. Vostroya's moon was referred to as V