Invaders - Notable Campaigns: Ambushed by Traitors (734.M38) - In the Segmentum Solar, Space Marines from the Invaders 2nd Company investigated a reported Craftworld Aeldari sighting on Bissan. They were attacked by Word Bearers who arrived by strike cruiser. In the ensuing battle, a squad of Devastator Centurions staunchly defended their battle-brothers from atop the ruins of an old Exodite settlement, eventually destroying many tainted tanks, Forgefiends and Helbrutes. The Invaders Chapter launched an all-out assault on their attackers, eventually driving the Traitors from the planet. The victory was attributed to the tactical awareness of Centurion Sergeant Thynor; he downed a Word Bearers Thunderhawk before the reinforcements aboard could deploy, turning the battle. Modest, he accredited the success to the precision afforded by his omniscope.Assault on Craftworld Idharae (852.M41) - The Invaders' most notable engagement as a Chapter came in 852.M41 when they launched an all-out invasion on the Aeldari craftworld of Idharae. During the fierce fighting, the mysterious revenant Astartes known as the Legion of the Damned came to the aid of the Invaders Chapter as they waged a devastating attack upon the craftworld. When their flaming bolts did little harm to the raging Craftworld Aeldari Avatar of Khaine at the heart of the battle, the Legion instead blew out the great dome under which they fought. The Legion vanished once more as the Aeldari defenders and the single surviving member of the Invaders force left fighting there were blasted out into the void. The once-grand craftworld was left as a ruined and desolate hulk with its surviving Aeldari population forced to flee into open space, where they eventually found sanctuary aboard the craftworld Alaitoc.Battle of Ogrys (895.M41) - The Invaders' brutal destruction of Idharae came home to roost some 43 standard years later when the Craftworld Aeldari survivors of the Invaders' original assault, now with the full backing of the Alaitoc craftworld where they had found sanctuary, launched their own assault upon Ogrys, the Invaders' homeworld. Still recovering their numbers from the original attack upon Idharae, the Invaders were incapable of properly defending their fortress-monastery from the vengeance-minded xenos. The Invaders were quickly defeated by the Aeldari and were reduced in size to a mere 3 companies of surviving Astartes and lost most of their battle honours and much of their Chapter wargear and vehicles to the destruction of their fortress-monastery. The surviving Space Marines of the Invaders were forced to become a fleet-based Chapter, moving their operations to the remnants of their Chapter fleet that survived the massacre on Ogrys.Purging of Jollana (913.M41) - Destruction came to the Great Librarium of Jollana in 913.M41 at the hands of the thrice-reviled Chaos Sorcerer Ahriman of the Thousand Sons Traitor Legion. Determined to take the secrets of the Librarium for himself, Ahriman wiped out Jollana's defenders and ruined much of the Librarium. In the wake of Ahriman's attack, the Invaders despatched 3 companies alongside a relief army of Astra Militarum to Jollana to secure the Librarium. Unable to determine whether or not Ahriman's forces were still present in its catacombs, the Invaders nonetheless acted with their Chapter's famed recklessness and launched a full-scale assault -- though Ahriman was long gone. As the Chapter's Drop Pods crashed home, they unknowingly triggered the complex system of sorcerous wards that Ahriman had left in place as one last act of devilment. Scouring the fire-blackened rubble for any trace of the foe, arcane energies began to build and were eventually released in a violent cascade of pink Warpflame that incinerated the guardsmen to a man. The Invaders fared better, protected from the sorcerous assault by their power armour. Yet the dangers to assail the Invaders had only begun. As the fires guttered and died, the walls of reality were torn asunder and Tzeentchian Daemons burst through the veil between the Immaterium and realspace into the Librarium's great hall. A contingent of Grey Knights Space Marines then arrived in orbit of Jollana. The Invaders had been fighting for their survival for solar days. Under such circumstances, an Exterminatus order would normally have been executed, but in the case of Jollana, this was not a viable option. The datastacks of the Great Librarium contained knowledge that existed nowhere else in the galaxy, and so the Grey Knights were ordered to retake the Librarium rather than see it and its precious knowledge destroyed. The Grey Knights teleported into the bloody melee between the Daemons and the embattled Invaders. Through their timely intervention, 15 Grey Knights rescued near five time their number of fellow Space Marines. Though they emerged victorious, the Chaos threat remained. The combined force of Invaders and Grey Knights assaulted the Great Hall of the Librarium, confronted another horde of Daemons as well as the dire threat of a Greater Daemon of Tzeentch known as a Lord of Change. Of the Invaders, only a dozen survived, and none would be permitted to retain any memory of their deeds that day by the Inquisition. Nonetheless, a great victory had been won for the Emperor. Though the rebuilding would take many long standard years, Jollana and its Librarium had been saved, and the Daemonic threat against neighbouring star systems had been put down, at least for now.