Battle of Prospero - Bloody Tally of Justice: All told well over thirty million lives were lost in the prosecution of the Emperor's justice on Prospero, the vast majority of these deaths being those citizens of the Imperium on the planet at the time of the Imperial Censure Fleet's arrival. Official records place the number of survivors from Prospero's civilian population at zero, and while in actuality there were certainly some thousands at large in the galaxy or who potentially escaped with one of the few bands of Thousand Sons to leave the planet alive, as a people the Prosperine branch of Mankind was now extinct.Of the Thousand Sons, official records before 014.M31 no longer listed the Legion, assuming it was completely destroyed until the Siege of Terra. Again, the actual truth is somewhat different, but still places the losses incurred for those Thousand Sons on Prospero at the time of the fleet's arrival at near-total, with the survivors scattered across the galaxy.Some of those Thousand Sons detachments fighting in the Great Crusade elsewhere in the Imperium were to be destroyed by their allies before news of Prospero's destruction reached them: 2,000 under Sentor Rahme of the 9th Fellowship were slaughtered in their encampments by the Ultramarines attached to the same force, and 300 Veterans of the 7th Fellowship were abandoned to their deaths during the assault on Maktor VIII by the Imperial Fists to name but two of the more prominent cases.Of all the main contingents of the Thousand Sons abroad in the galaxy, only two were known to have escaped Imperial justice, the majority of the 4th Fellowship, some 5,000 Legiones Astartes who abandoned their Great Crusade assignment after hearing of the attack on Prospero, and a force, perhaps of several thousand, of the 6th Fellowship present on Zhao-Arkhad, as part of the agreement between the Legion and that distant and enigmatic Forge World. Worse still for the Legion, the destruction of Prospero and their status as Renegades left them bereft of all support and succour within the borders of the Imperium, with no means to resupply or recruit, barring open piracy.The Censure Host fared only somewhat better, taking combined casualties of perhaps 49,000 in total and a far greater toll of munitions and machinery either destroyed or abandoned on Prospero. Driven by the cold rage of their Primarch Leman Russ to engage in some of the bloodiest fighting of the campaign, the Space Wolves suffered the heaviest casualties, with some 25,000 listed as killed in combat, and several thousand more besides, mostly of the Thirteenth Great Company simply listed as missing. The figure constituted a substantial amount of the Space Wolves' total strength and by the formal outbreak of the Horus Heresy, a mere handful of solar months later, they'd had little chance to replenish their numbers.Just as serious for the Space Wolves was the expenditure of munitions and equipment -- such was the zeal with which they prosecuted the war on Prospero that their reserves of such things were badly depleted and left them unable to engage in more than limited warfare during the early stages of the Heresy.The Imperial Army units attached to the Censure Host, although an auxiliary, also suffered badly in the fighting, with an estimated 23,000 dead. Indeed, several units were simply disbanded or merged with other formations on their return to Terra. The Legio Custodes and Silent Sisterhood suffered relatively light casualties by contrast, although considering the smaller relative size of those forces, they could still be considered severe.Perhaps more telling was the damage done to the Legio Custodes' mythical invincibility in the minds of some -- for during the fighting on Prospero, some of their number had been engaged and beaten by mere Space Marines, a lesson that would be remembered by certain of the Astartes in later years. However, the wiser minds among the Legiones Astartes noticed the ease with which the Custodians had despatched their kind in turn, and wondered uneasily if perhaps this had been the very task they had originally been made for.