Siege of Vraks

The Siege of Vraks was an Imperial miltary campaign fought over the course of 17 standard years to retake the Imperial Armoury World of Vraks from the heretical Forces of Chaos led by the Apostate Cardinal Xaphan.

Background
After the previous Cardinal of the Scarus Sector in Segmentum Obscurus died, his successor, Cardinal Xaphan, took his place as the cardinal of the Scarus Sector. Over the course of many years, Xaphan undertook a pilgrimage across the Scarus Sector, his new domain. He wished to see the places he would preside over, and he wished to bring a spiritual revival to the people. Where he and his entourage passed, he amassed ever more followers in a series of religious uprisings. Criminal governments and oppressive tyrannies were shattered with each world he traveled to. Whispering into his ear was the Cardinal's favored advisor, Deacon Mamon, a secret devotee of Chaos. After years of pilgrimage, Xaphan went into seclusion on the Imperial armoury world of Vraks, also the site of a popular Imperial Cult shrine. Here, Xaphan chose his battlefield. Believing that corruption was eating away at the Imperium, he thought himself a messianic figure destined to ignite a holy war and give the faithful a chance to purge the galaxy of darkness. Believing the Cardinal to be amassing far too much popularity and power, an agent of the Officio Assassinorum was sent by the Ordo Hereticus of the Inquisition to assassinate Xaphan during one of his sermons. After the failed attempt on his life by this operative, the Armoury World of Vraks erupted in full-scale rebellion against the Imperium. It wasn't long until the Citadel and the industry of the armoury world were under Xaphan's control. By seceding Vraks from the Imperium, Imperial forces in the sector and, in some cases, the entire Segmentum, would be left without adequate resupply of arms and armour. By breaking the Imperial supply chain of which Vraks was a part, forces as far removed and important as the Cadian Imperial Guard Regiments guarding the Eye of Terror would be sparsely armed, allowing a potentially major Chaos incursion to occur in or around the Cadian Gate. The Administratum deemed that Vraks must be returned to the Imperium's fold. By the time word reached the Imperium of the rebellion on Vraks, it was already too late. Millions of Traitors and heretics were now dug into meticulously planned, constructed, and reinforced defences, with massive orbital lasers protecting the world's Citadel from orbital bombardment and assault. It fell on the Imperial Guardsmen of the Death Korps of Krieg, united under the umbrella of the Imperium's 88th Siege Army, to dislodge the traitorous forces of Cardinal Xaphan in what would become a grinding war of attrition that would consume millions of lives across 17 standard years of battle.