Enduring Duty - Duty is paramount to a Crimson Fists Space Marine and even when the shadow of death falls upon him or his companions he will continue to fight on to the end. The Librarian steels his own spirit or that of one of his companions to fight on, even when the body should have given up and all hope is gone. Either the Librarian or a single ally within range can be the target of Enduring Duty. While this power is maintained, a battle-brother can continue to fight on, even after suffering mortal wounds which will eventually kill him, ignoring his fatigue and extreme pain. The Crimson Fists were amongst the most numerous of the Adeptus Astartes Chapters present upon Vigilus. That in itself was a significant achievement, given their tragic past. The integration into the Chapter of the Primaris Space Marines brought to Rynn's World by Roboute Guilliman had gone well. They had worked hard to bring their new Primaris brethren into the fold, teaching them the rites of battle and training alongside them night and day until the new warriors fought seamlessly with the old. Each new recruit to the Chapter underwent the trials of the Bloodied Fist, returning with his bare hands stained with the gore of a barb-dragon and the right to wear crimson upon his right hand. Over time, the Crimson Fists have become particularly adept at combating these savage xenos, though they have also engaged in countless battles against a broad spectrum of opponents across the span of the galaxy. As successors of the Imperial Fists, they proudly maintain that legacy while also holding true to the teachings of the Codex Astartes.

Soon after the birth of the Great Rift, some time early in the 42nd Millennium, Rynn's World was engulfed by daemonic legions spilling forth from the newly formed rift. The daemons were led by the Daemon Prince Rhaxor and the Crimson Fists were forced to battle for their homeworld's survival once more, though they had little chance of success with such depleted ranks. Only 16 Crimson Fists garrisoned in the fortress-monastery survived, including Chapter Master Pedro Kantor and Captain Alessio Cortez. The surviving Crimson Fists stayed in New Rynn City and held out against the Orkish siege of the city. Though but two dozen in number, Kantor and his Crimson Fists fought as heroes of legend, taking a grievous toll on an Ork horde that numbered hundreds. With Kantor at the forefront, the Space Marines battled their way clear of the ravine's treacherous confines and sought the high ground. There they planted their feet and fought shoulder to shoulder against the horde, but still the Orks kept coming. With all the Crimson Fists' Thunderhawk gunships lost in battle or under heavy repair, Kantor knew that both evacuation and reinforcement were impossible, and the Orks showed no sign of giving up the battle.

Accessories

Yet without the efficiency, conviction and compassion of the Crimson Fists, Dirkden would have fallen long before the culmination of the War of Beasts, and doomed millions more innocent souls.

For unknown reasons, in the last century of the 41 st Millennium, the Soul Drinkers were declared Excommunicate Traitoris and all records of the Chapter were destroyed by an Inquisitorial Edict of Obliteration. Somehow these Renegade Space Marines escaped destruction. The Crimson Fists are noted for having an extensive calendar of sacred days to honour the Emperor and their primarch as well as practising a number of traditions and rituals unique to their Chapter: Across the ages, the Crimson Fists built a reputation of loyal service and utter competency in the fight against any who would oppose the Imperium of Man. Much of their activity was focused within the Loki Sector of the Segmentum Tempestus, but this was not the only region of the galaxy in which they defended the realm of the Emperor.

With the success of the Voltigern Crusade, in 745.M40, the High Lords of Terra rewarded the Crimson Fists by granting them full feudal rights to the feudal Agri-World known as Rynn's World within the Loki Sector. The Crimson Fists soon constructed their fortress-monastery, the Arx Tyrannus, from the remains of the great vessel that had long served as their mobile headquarters while they were a Fleet-based Chapter. Over the course of this crusade, the Chapter blunted countless significant Ork forces within the sector, preventing them from unifying into a single overwhelming threat. Also in keeping with the spirit of the original mission, the team decided to collect and paint entirely new armies in the style of their 1980’s predecessors. For the Crimson Fists they were able to capture the Rogue Trader look by utilising the new plastic ‘beakie’ MKVI Space Marines, and for the Space Ork Raiders subtle use of paint schemes and iconography taken straight from the first edition rulebook created an unmistakably retro looking Ork army. The Crimson Fists never hesitate to demonstrate their devotion to the Imperium and embody it with their battle cry: "There is only the Emperor. He is our shield and our protector!" Chapter Dispute (819.M41) - A perceived slight caused the Mortifactors and Crimson Fists to come to blows. Only a personal intercession by the Ultramarines' Chapter Master Marneus Calgar ended the dispute before it escalated into open warfare. The matter was kept from the attention of the Adeptus Terra.