Last Men Standing

The event known as the Last Men Standing was a campaign conducted by the Invictors of Mars, that was part of the larger Indomitus Crusade to take the fight to the Forces of Chaos.

History
The surviving Invictors of the last battle came and aided the desperate Astra Militarum regiments with the breaking of the Traitor's defences. Slowly advancing through a wave of corpses until reaching a wall filled with gunners shooting upon every centimeter of land. Launching three separate suicide charges the Astartes broke the wall further advancing in. Several ambushes would be made by the Traitors thinning the number of the Chapter ever more. When the Astartes reached the last outpost there were only fifteen Astartes left. The remaining fifteen would charge inside of the outpost killing everybody inside and liberating the planet in the process. While fighting, ten battle-brothers would die, either from the wave of bullets or killed when the wave of spears charged the Astartes in a bold counter-charge. The remaining five would leave the planet and head for another warzone to die with honour. When the surviving members of the Chapter were about to leave the system, they encountered the recently resurrected Ultramarines Primarch Roboute Guilliman and his Indomitus Crusade fleet. The survivors would be greeted by the Primarch and would meet their new Primaris Space Marine brethren. After the newly inducted Primaris brethren replenished the ranks of the Chapter, the Astartes would sit upon a barren world where their beliefs and culture would be taught to their new brethren.