House Vextrix - Notable Campaigns: Battle of Daxos Gemini (Unknown Date.Early M31) - Following the Warmaster Horus' open betrayal of the Emperor, the first act of House Vextrix during the Horus Heresy was to purge their own homeworld of dissenting Loyalist elements. They adorned the buttresses of their fortress with the corpses of the ruling Noble house whose loyalty to the Imperium proved unquestionable. Following this act of bloodshed, House Vextrix took to the stars in service to the Warmaster, serving alongside the Legio Mortis. Wherever the Traitor Titans prosecuted their heretical wars they were accompanied by lances of Vextrix Knights.Cataclysm of Iron (010-015.M31) - Across border sectors of the Segmentum Tempestus and the Segmentum Pacificus are located numerous lesser Forge Worlds known collectively as the "Belt of Iron." After the sundering of the Imperium, many declared for the Traitor cause at the engineering of the treacherous fabricator-general of Mars, while others remained loyal to Terra or sought to remain as aloof as possible from the conflict. Strife and tentative conflict between these once-aligned worlds erupted into full-scale war in 010.M31, pitching the Mars-aligned Forge Worlds of Incunabula, Urdesh, Valia-Maximal and Kalibrax against the forces of the Loyalist worlds of Graia, Arl'yeth and Atar-Median, while Arachnis and Jerulas Station both fell into civil war. The resulting conflict, that later became known as the "Cataclysm of Iron," saw the forge lords, their armies and allied Titan Legions and Knight Houses turn on each other in protracted warfare, with scores of Human-inhabited worlds in the region suffering as they become the battlegrounds upon which they fight.Second Invasion of the Findari Spoil (091.012-417.012.M31) - The barren world Findari Prime, contained within the borders of the Findari Spoil, saw the tread of Traitors once more when an assault, spearheaded by the warriors of House Vextrix, made landfall upon the planet. This caused much confusion to the First Shield Nuvarss who had been tasked with defending the Spoil, for the force assembled by the Traitors posed only a minimal threat to the defences erected by Kalibrax years before and since strengthened by the Tech-priests of Atar-Median. The actions of the Traitor forces also stood at odds with conventional invasion tactics, with roaming groups of House Vextrix Knights moving from location to location, with evidence of collapsed digsites at the centre of each. To understand the logic behind the actions of the Traitor forces, a directive was issued demanding the capture and interrogation of a Traitor Tech-priest in order to extract the purpose behind the invasion. After several solar weeks of running battles, during which House Vextrix managed to fell three Legio Atarus Titans amongst the World Spine Crags, the warriors of House Col'Khak achieved their goal, capturing a Tech-priest left behind as the Traitors enacted a hasty evacuation of the planet's surface.Battle of Beta-Garmon, "The Titandeath" (006-013.M31) - Numerous Traitor Titan Legions engage in battle with their Loyalist counterparts throughout the Beta-Garmon star cluster. Knight houses fight on both sides of the sprawling conflict, upholding oaths to follow the god-machines into the fray. Whole households are lost in the war zone, their once-mighty war engines reduced to flaming wreckage alongside the metallic carcasses of annihilated Titans. Marching alongside their Titan allies of the Legio Mortis, the Vextrix Knights also suffered staggering casualties, but this only served to stoke their hatred of the Imperium, and of those who continued to blindly serve the Omnissiah. Those Vextrix Knights who had expressed even the slightest reservation in siding with their bond-lieges against the Imperium are placed on the front lines, where they suffer the greatest losses. The conflict therefore becomes known amongst the nobility of Daxos Gemini as the "Great Cull."13th Black Crusade (999.M41) - Iconoclast households, Infernal households and Dreadblades from across the galaxy flock to the banner of Abaddon the Despoiler as he launches his 13th Black Crusade. Dread lances march on multiple fronts. On Macharia, Chaos Knights of House Vextrix, House Iattol, House Mesmr and House Lucaris battle alongside various warbands of Heretic Astartes to lay waste to the militarised hive cities. Throughout the crusade, many Chaos Knights pledge fealty to Abaddon for the first time, whereas others settle blood oaths against the Imperium that had stood for millennia.