House Oroborn - Notable Campaigns: Defence of Ryza (012.M31) - Amongst the echelons of the Cult Mechanicus, Ryza stood second only to Mars in power and prominence by the end of the Great Crusade. Located within the Ultima Segmentum, its position was secured by its raw manufacturing power and its tactical location that, since Ryza first forged treaties with the Imperium, served to fuel the reach of the Great Crusade eastwards across the galaxy. Above all else, Ryza possessed unparalleled expertise in the  engineering and production of plasma technology. Though the war had ravaged much of the  surrounding segmentum, Ryza had remained free of taint and conflict despite, or perhaps because of, the power it wielded. Yet its growing power had not gone unnoticed and, when time came for the Warmaster Horus to assault the Segmentum Solar, he moved to enforce his will upon those who had escaped notice and might yet threaten his flanks as he marched upon the cradle of Humanity. The resurgent might of Ryza proved too powerful an enclave to ignore, for it served as a waystation for Imperial forces and, left unchecked, might yet unite resistance if the absence of the Warmaster's allies allowed his foes to rally. It fell to Yuritus Omicron, fabricator-locum of Estaban VII, to conquer Ryza. In accordance with the Warmaster's wishes, Omicron assembled the might of the Legio Magna and the Legio Vulturum, promises of vast riches awaiting their patrons should their aid bring success. With them came a decad of Titans from the Legio Mortis, their presence demanded by the Warmaster to ensure victory. In all, nearly 140 Titans were assembled, their gathered might a portent of doom for the world of Ryza. These Titan Legions were not to walk alone, for the Knight houses of Morbidia and Oroborn had been amassed alongside them. With them came vast hosts of Mechanicum Taghmata, supported by a menagerie of twisted creations given life by the minds of their Dark Mechanicum masters. So gathered, the Traitor fleet departed from the fringes of the Beta-Garmon system where they had gathered for the Ryza system, intent upon conquest.Ruins of Prosperity (012.M31) - No longer embroiled in conflict with the Legio Crucius, the Legio Vulturum marched west upon the southern continent of Ryza, scattering the gathered might of the Legio Osedax before them as fresh reinforcements flowed from the recently captured Conveyance Terminus Nine-Omega, the Titans of the Legio Mortis amongst them. Across the Sea of Reclamation, it fell to Legio Magna to pursue the fleeing Warmongers. To this end, the Flaming Skulls, supported by companies of tanks and the Knights of House Oroborn, descended upon the forge city of Prosperity, sweeping aside any in their way. Prosperity was a vital cog in the production of materiel and plasma reactors, the latter destined to power both Titans and vessels. Though ostensibly a city turned towards manufacture, Prosperity was both a centre of industry and a fortress constructed to withstand assault, the strength of its walls tested many times during the Age of Strife. As to the city of Prosperity itself, both Loyalist and Traitor deemed the city too important to risk raining wanton destruction down upon it and it was before the walls of Prosperity that the Loyalists gathered, meeting the Traitors as they marched across the barren plains of Ryza. Though Legio Magna managed to breach the formidable defences of the city, the Loyalists made them pay for every step the god-engines took into the city. Before Prosperity, the barren plain lay wreathed in smoke, its expanse littered with broken Titans and the tens of thousands of lesser troops crushed underfoot as the god-engines gave battle. As both sides regrouped, the Traitors plotted their next moves. Though many amongst the Legio urged a fresh assault, wishing to sate their bloodlust in glorious battle, their demands were overruled by Fabricator-Locum Omicron who bade them wait but a single night. As the sun set on Prosperity, the Loyalists arrayed themselves before its walls once more, awaiting the renewed assault they believed all but inevitable. In place of this they were met, however, by a gathering storm as the sky wept blood from blackened clouds. Within the city, debased cultists gathered in secret covens and enacted foul rituals that stirred the unnatural meteorological event into greater frenzy. Soon, rivers of blood flowed through Prosperity's streets, sickening all they touched with unnatural swiftness, while tainted winds battered the city, driving its populace mad as they fell upon each other in torment. At the apex of madness, as the city screamed its woes to the heavens, a great otherworldly howl rent the night, torn from the throat of a creature ancient and terrible. In an instant, every machine across Prosperity fell silent, plunging all into darkness. None outside the city moved, fearful of venturing within lest they be drawn into an ambush. Prosperity was abandoned to its fate.Battle of Beta-Garmon, "The Titandeath" (006-013.M31) - House Oroborn took part in the long and savage Beta-Garmon campaign, which included hundreds of war zones across dozens of worlds. During this conflict, House Oroborn provided Knight support to the Legio Mortis. Even before the greater armies of the Warmaster Horus reached the star cluster, the battle lines had long since been drawn, and fighting had been going on for many Terran years. It was a cauldron of battle that would consume millions of lives before its end and see the demise of entire Titan Legions, earning this campaign the dire moniker of the "Titandeath." The Beta-Garmon Cluster, also known as the gateway to the throneworld of Terra, was the last hurdle that the Warmaster Horus' forces had to overcome before they reached the Imperium's capital world. Heavily fortified by the Loyalists, Beta-Garmon would become one of the greatest and bloodiest battles of the Horus Heresy, as well as one of the longest-lasting.