Legio Invicta - Notable Campaigns: War of Lochrisus (412.M35) - The Imperial Warmaster Gallivant ordered the Legio Invicta to the Shackropal System to stem a swarming by the xenos known as the Lethids. The Legio Invicta 's commander refused, claiming it would be a waste of his war engines' time and materiel. The Shakropal star went supernova the next year, and the Lethids were immolated without need for the Titan Legion's intervention.Persecution of Warmaster Hengis (741.M41) - Once again the Legio refused an Imperial edict when their Princeps Maximus was forced to disobey the clinically insane Imperial Warmaster Hengis on Talphus VII. The Legio Invicta was ordered, eventually, to annihilate the insane Warmaster and the forces that followed him. This Imperial action against one of the Emperor's own was kept quiet and all records of it were kept sequestered within the Imperial archives by order of the Inquisition.Beltran Cluster Campaign (771-778.M41) - The Beltran Cluster Campaign was a seven-standard-year-long campaign executed against the Eldar in the Beltran Cluster. The campaign was a success but the Legio Invicta suffered the loss of 8 war engines to the subtle, graceful Titans of the Eldar.Defence of Orestes (779.M41) - The homeworld of the Legio Tempestus, the Forge World of Orestes, was invaded by a large force of Traitor Titans during the Sabbat Worlds Crusade, to which the world had contributed much war materiel and for which it was a vital source of supply by virtue of its close proximity to the theatre. The Crusade Warmaster's constant requests for materiel and the support of the Legio Tempestus had drained the world of resources and left it weak -- rendering it a perfect target for Archon Urlock Gaur, the commander of the Forces of Chaos in the sector. The Dark Mechanicus in the Archenemy's service blinded the planet's sensors and allowed bulk landers to set down in the Astrobleme region and disgorge their engines of war. As a result of the Forge World's having met the Warmaster's demands, the Legio Tempestus had been left with only a token force of twenty-two Titans to defend its homeworld -- nowhere near enough to face an enemy Titan force seven times this size. The Legio Tempestus was unable to cover ground and found itself outnumbered, outgunned and outmaneuvered at nearly every turn, losing eight Titans in the first days of fighting. Orestes escaped swift and inevitable destruction only thanks to the arrival of the Legio Invicta, which was passing near the planet on its way to the Sabbat front. The bulk of the Legio Invicta landed in Orestes Principal, and after three solar days of preparation, it moved out into the Jeromihah Subsidiary and adjacent areas, engaging the forces of the Archenemy on Orestes for the first time. The Legio's efforts bore fruit, as its forces scored many Titan kills with few losses of their own, eventually causing the Traitors to converge on the ruins of Hive Argentum in hopes of drawing the two Imperial Titan Legions to full-scale battle -- a challenge which the Legio Invicta Princeps Maximus Pietor Gearhart, against the advice of a number of his senior princeps, accepted, also wishing to wipe out the enemy. In the meantime, the Orestean Analyticae Department, at the behest of the Legio Invicta, had been reviewing pict scans of Traitor war engines in order to discover their original identities as Adeptus Mechanicus Titans, and in extension any weaknesses and construction flaws they might exhibit. To this end, the Orestean Magi opened sequestered archives, containing materials pertaining to the Horus Heresy and the times before the founding of the Imperium. Amongst these, a document proving beyond the shadow of a doubt that the Emperor of Mankind was not the Omnissiah was discovered, and leaked out of the Analyticae offices. Such revelation confirmed the beliefs of the Mechanicus of Orestes and many other Forge Worlds, and caused outrage amongst the Imperial populace of the Forge World. In the ensuing chaos, a triumvirate of conspirators -- Legio Tempestus Executor Fetial Enhort, Master of the Archives Tolemy, and Master of the Analyticae Egan -- moved in to seize power in the forge city. They had known about these revelations for several years, and were merely using the war as an excuse to open the archives and publish them. This news reached the Titans in the field as they were closing in on Hive Argentum, and caused a rift between the two Legios, for the Legio Invicta did not share the beliefs of their allies and continued to venerate the Emperor as the Omnissiah. Despite this theological strife, they continued their operations, and although they suffered some losses, they ultimately achieved a crushing victory, obliterating nearly the entire force positioned against them. Following the battle, the Legio Invicta Princeps Maximus Gearhart wished to move the forces of the two Legios back to the forge city to restore order, but was confronted by the Legio Tempestus. Despite being outnumbered by a four-to-one margin, the Legio of Orestes' acting commander issued Gearhart an ultimatum, telling him to stand with the Legio Tempestus or against it. Legio Tempestus war engines proceeded to acquire target locks on Legio Invicta machines. Bloodletting between the two Titan Legions was perhaps only averted by a miracle -- during the course of the war a large storm which blocked orbital scans emerged over the Western Prospection. This weather anomaly turned out to not be natural, but generated by a climate tower erected by the forces of the Archenemy in order to conceal a sizable part of its forces. This tower was discovered by a stray unit of the Imperial Guard which succeeded in destroying it. The emergence of this new threat posed by a previously hidden Traitor Titan battlegroup which outnumbered the remaining operational Imperial Titans caused the two Legions to set aside their religious differences and move to face it. By virtue of the skills of the Titan princeps, the Loyalist Titan Legios succeeded in destroying this threat as well, and by the time the fighting finished, the danger of schism within the Mechanicus was already over -- Tolemy revealed to Enhort and their associate, Egan, that he had manipulated the data to produce the outcome he had desired. Enhort was infuriated, stating that altered data undermined their position and the validity of their theological claims, and attempted to contact Gearhart to acquiesce to his demands. Tolemy attempted to strangle the Executor, but was stopped by Egan, who killed him with a weapon brought to the meeting in secret -- and subsequently committed suicide, struck with grief over the fabrication that he had unwittingly assisted. Following this event, Enhort submitted to Gearhart. Orestes had been delivered from the rampaging Traitor Titans and, alongside the broader Imperium, from the danger of a terrible religious schism.