Legio Honorum - Notable Campaigns: Schism of Mars (ca. 005.M31) - During the opening days of the Horus Heresy when the civil war known as the Schism of Mars erupted on the Red Planet, Titans of the Death Bolts became the targets of the opening volleys of the conflict. Along the borders of the Lunae Palus and Arcadia regions, a previously heated war of words between Mechanicum factions erupted into true warfare when Princeps Ulriche of the Legio Vulpa unleashed his god-engines upon the fortress of Maxen Vledig's Legio Honorum. Caught by surprise, the Death Bolts lost 19 Titans in the first solar hour of battle, before withdrawing into the frozen wastes of the Mare Boreum and seeking refuge in the dune fields of Olympia Undae. Their calls for reinforcement went unanswered, for all of Mars tore itself apart as the cancer of civil war spread across the Forge World in a raging firestorm.Battle of Beta-Garmon, "The Titandeath" (006-013.M31) - The Legio Honorum took part in the long and savage Beta-Garmon campaign, which included hundreds of war zones across dozens of worlds. 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. During the Battle of Beta-Garmon, the Legio Honorum was supported by the Knights of House Vornherr.Defence of Ryza (012.M31) - When the Dark Mechanicum moved to capture Ryza, one of the Imperium's foremost Forge Worlds under siege during the latter years of the Horus Heresy, several notable Loyalist Titan Legions, including the Legio Honorum, were called upon to help in its defence. The Loyalists could ill-afford to lose this valuable Forge Worlds as Ryza was second only to Mars in power and prominence. The Traitor force's main goal was the knowledge of Plasma Weapons and engines that Ryza held, for with this information, coupled with the daemonic pacts of the traitor Tech-Priests, Horus' power could be unmatched. The Warmaster cared little as to how his allies achieved their goals and while the Arch-Traitor desired only that the world be crippled beyond recovery, the Dark Mechanicum held more sinister ambitions for Ryza, seeking the creation of a new Hell-Forge for their profane experiments.Treachery of House Ioeden (012.M31) - With the fall of Ryza Secundus the way to the Forge World was open, yet it did not stand unguarded. Across the surface of the world orbital defences were spurred into life, their barrels turned upwards to the skies in anticipation of the impending invasion. The loss of Ryza Secundus had left Ryza isolated from the wider galaxy but it had not left the world unprotected. Initial forays by the Traitors were easily repelled, many of the landing craft blasted from the sky and what remained proved easy pickings for the Loyalist forces stationed across the world. Once more, when direct methods proved untenable the Traitors moved to more duplicitous means, calling upon those whose allegiances were not as they appeared. Loyalist forces waited for the  the opportunity to exploit the vulnerable Traitor forces. Such an opportunity presented itself at Conveyance Terminus Nine-Omega, an expansive spaceport located on the southern continent. A vital hub of transport and storage, Conveyance Terminus Nine-Omega was the largest of its kind on Ryza, used as both a centre of export and a staging ground for military forces, capable of supporting vast legions of troops should it be required. At the time of invasion, Conveyance Terminus Nine-Omega was garrisoned by a battlegroup of Legio Honorum Titans and the Knights of House Ioeden, a minor House known for their actions as raiders. When insurrection saw the fall of a forge-fane near Salvation Isthmus, the threat was deemed considerable enough to require the attentions of Legio Honorum. Led by the Princeps Seniores Galxexu, the Titans of Legio Honorum moved to recapture the forge-fane, safe in the knowledge that the orbital defences of Conveyance Terminus Nine-Omega, in conjunction with the Knights of House Ioeden, would ensure the spaceport's safety in their absence. It was only upon returning to the spaceport, as a cacophony of warnings announced the impending descent of the Traitors upon Conveyance Terminus Nine-Omega, that Galxexu released his mistake, one that would ultimately prove fatal to himself and much of Ryza.Imperial Muster at Beta-Garmon (012-013.M31) - For reasons only understood later in the war, the Ruinstorm that had been invoked by Lorgar, primarch of the Word Bearers, several standard years earlier during the Battle of Calth, began to abate across vast swathes of the galaxy. Loyalist high commanders were able to utilise the potent astropathic relay at Beta-Garmon to contact and recall formerly lost or stranded forces from across the war-torn reaches of the northern Imperium. The Imperial Muster at Beta-Garmon rapidly escalated into the largest gathering of Loyalist might since the early years of the war, a concentration of forces so mighty that the Traitors had to respond in kind. The resulting clash of arms would become known as the Great Slaughter, a theatre of war of such scale that it would encompass the "Titandeath" and the Sea of Fire campaigns, each major campaigns in their own right. By its end, both sides were so badly bled that their only remaining option for ultimate victory was to force a final, decisive confrontation. As history related, the final battle would be fought at Terra, but only after the weighty butcher's bill of the Great Slaughter was paid in full.13th Black Crusade (999.M41) - The Legio Honorum was one of many Imperial Titan Legions to deploy in defence of the Cadian Gate during the final assault of Abaddon the Despoiler's 13th Black Crusade.