Cato Sicarius - Damnos Incident: In 974.M41, Sicarius led an assault against the recently awakened Necrons that had overrun the resource-rich Mining World of Damnos, which was also a Necron Tomb World.Unable to land heavy weaponry and ground vehicles due to skyfiring Gauss Pylons, the Captain relied on the use of his infantry in a two-pronged Drop Pod insertion.The first group, led by Chief Librarian Tigurius, was tasked with the destruction of the Necron artillery situated on the hills of Thanatos. Once this objective was met, the Ultramarines could field tanks and Thunderhawk gunships to better counter the xenos with their heavy guns.The second group, led by Captain Sicarius, was to relieve and liberate the only surviving human city on Damnos, Kellenport, the planetary capital.Chainsword and Bolter brought the fury of the Adeptus Astartes to the Necron phalanxes, but even when the Space Marines had joined forces with the surviving Imperial Guard troops present on the world, the xenos did not bow and were ever ruthless and indomitable.Sicarius himself cut down dozens of Necron raiders and single-handedly crippled a looming Necron Monolith with a well-placed Melta-Bomb, but these heroics barely slowed the enemy's advance. In frustration, Sicarius sought to buy more time for Tigurius's strike team by assaulting the supreme Necron Overlord, known as "the Undying."The duel proved closely matched, but the Necron leader's raw strength served as the deciding factor when his Warscythe cut deep into Sicarius' torso and grievously wounded the Ultramarine officer.Roaring in anguish, the Venerable Dreadnought Agrippan stormed through the Necron ranks to protect the body of the fallen Captain and crushed the xenos overlord. This led the rest of the xenos army to revert to vulnerable defensive protocols that the Ultramarines briefly exploited.Meanwhile, Tigurius' forces had managed to destroy the Gauss Pylon battery, which allowed the Ultramarines to land tanks and gunships. However, despite their best efforts, the Ultramarines were eventually forced to evacuate the surviving citizens and withdraw from Damnos.This course of events became known as the Damnos Incident, and the world was lost to the Necrons and classified as a Forbidden World by the Imperium.It can be argued that since Sicarius and his men were able to evacuate large swathes of the world's population from certain death, the mission was not a complete failure. However, the fact remains that the Ultramarines failed in their primary objective of destroying the Necron threat that had emerged on Damnos.Sicarius was determined to not let such a slight go unanswered for long. For the first time, he had tasted bitter defeat in battle and it was a black mark that would twist within his breast for the next twenty-five standard years.In future battles, his violent displays of courage became reckless to the point of unnecessarily endangering the lives of his men and every victory after Damnos rang hollow to him.In the aftermath of Damnos, as Sicarius recovered from the wounds he had suffered, Sergeant Chronus was by unanimous assent honoured with the title of "Spear of Macragge", a title rarely bestowed in the history of the Chapter and only given to an Astartes who was considered a great hero of the Ultramarines.Some say this was a move by Sicarius' detractors to lessen his influence.