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 Prime from the heretical Forces of Chaos led by the Apostate Cardinal-Astra Xaphan. Vraks was besieged by the forces of the Imperium of Man in 813.M41, after the attempted assassination by an agent of the Officio Assassinorum of the heretical and traitorous Cardinal-Astra of the Scarus Sector, Xaphan, failed. The Imperial Guard's 88th Siege Army was raised from line regiments of the Death Korps of Krieg to undertake the siege of Vraks and bring the renegade cardinal down in a campaign of attrition that the Administratum's Adepts calculated would take 12 standard years to successfully conclude. Overall command of the army and the Vraksian Campaign was