Cadian Shock Troops - The 13th Black Crusade and the Fall of Cadia: It was on Cadia itself, during the 13th Black Crusade of Abaddon the Despoiler in 999.M41, that the legendary Cadian resolve was put to its most gruelling test. Long foreseen by mystics and strategists alike, the last onslaught from the Eye of Terror was like nothing Cadia had ever faced before. As Imperial battlefleets met the dread Chaos warships spewing forth from the Immaterium, the planet's already formidable defences were hastily reinforced. Regiments returned in droves from the distant war zones to bolster Cadia's standing garrison. They were joined by the mighty Adeptus Astartes, war engines of the Adeptus Mechanicus and gleaming ranks of the Adepta Sororitas.Millions perished in the opening assault, and as the first solar hours of battle turned into days, the slaughter showed no sign of abating. As they had been drilled to do, the Cadian Shock Troops fought to their last dying gasp. Thoughts of despair were quickly drowned out by the bellowed orders of Platoon Commanders, directing those in their charge to hold the line -- and hold they did. Every Cadian soldier had been trained from birth to sell their life willingly so that vile Chaos scum might pay for their trespasses in blood.On uncountable fronts the Cadians meted out as much punishment as they received -- obliterating waves of Chaos worshippers with creeping artillery barrages and dogged tank formations, and bringing down colossal daemonic beasts with sheer weight of las-fire. Despite their heroic defiance, Cadia -- which for ten standard millennia had stood as the bulwark against the denizens of the Warp -- was consumed by a cataclysmic firestorm when Abaddon sent his crippled Blackstone Fortress Pillars of Eternity crashing onto its surface. The planet was beyond saving, its defenders powerless against the hordes of Daemons surging forth to claim the once-defiant world.Though their home planet was utterly sundered, the resolve of the Cadians has not been not broken. Veteran survivors of the last battle for Cadia, along with regiments of their kinsmen scattered across war zones throughout the galaxy, now fight even more doggedly against the enemies of the Imperium. Whole generations of Shock Troopers are born, raised and trained en route to war zones, and soldiers from other worlds with the mettle to withstand Cadian training are inducted into their ranks. The mantra "Cadia Stands!" which was oft repeated during the planet's final violent days by the legendary Cadian commander Ursarker E. Creed, has gained purchase within the officer corps and amongst the platoons. For Cadia does indeed stand, as long as a single Cadian soldier continues to fight.In the wake of the Fall of Cadia, the remnants of the Imperial Navy's Battlefleet Cadia and the Cadian Shock Troops who managed to escape the destruction of their homeworld managed to make it through the roiling Warp to the Agripinaa System under the command of Admiral d'Armitage and General Maximus Octavian Grüber III. They discovered that system already under assault by multiple warbands of Chaos Space Marines, including one drawn from the Sons of Malice, who held a particularl grudge against Cadians for their role in the destruction of the Heretic Astartes homeworld of Scelus. The Cadian fleet had become divided while transiting the Warp, and the smaller portion of the fleet under the command of General Grüber was forced to make a final stand on the ice moon of Faith's Anchorage, unleashing the larger Battle of Faith's Anchorage. The conflict eventually resulted in an Imperial victory with the arrival of the other remaining portion of Battlefleet Cadia under the command of Admiral d'Armitage and reinforcements from the Space Wolves. In the wake of the battle, the Agripinna System was ultimately cleared of all Chaos forces.Chaeros was an Industrial World that was the seventh world of the Agripinaa System. It had been invaded by Abaddon the Despoiler's forces during the 13th Black Crusade. Imperial military forces that escaped the Fall of Cadia would later arrive in the Agripinaa System and clear it of the Chaos forces following the Battle of Faith's Anchorage. Once the system was cleansed of the presence of the servants of the Ruinous Powers, General Isaia Bendikt of the Cadian Shock Troops, who had also fought at Faith's Anchorage and to clear the wider system, declared Chaeros was to be renamed "New Cadia" and serve as the new home for all Cadian survivors. However, it is not known if the Imperium accepted his renaming of the world as official.