Legio Interfector - Notable Campaigns: Isstvan III Atrocity (005-006.M31) - The Warmaster Horus revealed the terrible scale of his treacherous ambition when he engineered the Betrayal at Isstvan III, purging his own and three other Legiones Astartes of those who could not be relied upon to swear to his cause. The slaughter is made all the more terrible by the alliance of Legio Interfector (then known as the "Lords of Valour"), Legion Mortis, Legio Audax and Legio Vulpa, whose god-engines are impervious to the Life-Eater virus unleashed against the betrayed Loyalists, and which stride through the firestorms as towering and vengeful giants of legend. After the events of this atrocity, the Legio Interfector would be known forevermore as the "Murder Lords".Battle of Molech (009.M31) - Molech was a Knight World ruled over by House Devine ever since the Emperor Himself led an expedition to bring it into the fledgling Imperium and left a significant garrison there. The planet thrived under the rule of Devine, the populace of its capital city of Lupercalia never knowing the true reason why the Emperor had taken it upon Himself to lead the force that claimed it. Unfortunately for the citizens of Molech, the traitor Horus knew exactly what lay beneath the city that had been name in his honour -- a Warp Gate which, it was said, had allowed the Emperor to convene with the Ruinous Powers themselves. When Loyalist forces became aware of the Traitor fleet's approach, they mustered at Molech. As well as a trio of Titan Legions -- the Legio Gryphonicus, Legio Crucius, and Legio Fortidus -- there were elements of each of the Imperium's fighting forces, including nearly a dozen Knight Houses which owed fealty to Devine. The Traitor force was equally impressive, featuring no fewer than four Titan Legions: the Legio Vulpa, Legio Interfector, Legio Vulcanum I, and the infamous Legio Mortis. As the Warmaster unleashed a massive coordinated assault, the planet's defenders were thrown into disarray when the Plasma Reactor of an Imperator-class Titan was destroyed. Thousands of Loyalists were immolated in a blinding flash as a miniature sun erupted from the Titan's core to leave a smoking crater half a Terran mile wide. In the wake of the catastrophic blast, the spearhead of Traitor Titans marched through the gap in the Imperial lines. At the height of the battle, House Devine revealed its true allegiance to the Warmaster, its treachery unveiled at a pivotal moment, heralding a slaughter from which only a handful of Loyalists escaped. Caught between the treacherous Knights of House Devine and Horus' rampant forces, the shattered remnants of Molech's defenders were slaughtered without mercy. They were totally defeated, so brutally that only one in a hundred of the troops of the Imperial Army survived the campaign. After his passage through the portal into the Realm of Chaos, Horus won the full blessing of the Ruinous Powers as their champion. His drive on Terra seemed unstoppable.Battle of Beta-Garmon, "The Titandeath" (006-013.M31) - The Legio Interfector took part in the long and savage Beta-Garmon campaign, which included hundreds of war zones across dozens of worlds. During this conflict, the Legio Interfector was supported by the Knights of House Makabius. 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.Battle of Eagle Gate (946.M41) - As recounted more fully above, the Legio Interfector supported the Foresworn splinter warband of the Word Bearers Traitor Legion in their quest to raze the Shrine World of Eydolim, which they helped to create millennia ago, in the days of the Great Crusade. The Murder Lords took part in a number of engagements throughout the campaign, including an invasion of the Forge World Lector's Lowell, and the final assault on Eydol City, the capital of Eydolim, where the Chaos forces were ultimately thrown back.