Oathkeepers

Chapter Profile: Oathkeepers
Like most chapters, the Oathkeepers Chapter can trace its Gene-Seed back through the various foundings to the Ultramarines. However, the link is tenuous, as the Chapter features a number of slightly divergent traits, although this is to be expected considering how far removed from the original Chapter they are.

These deviations are, on the whole, fairly minor, and are mostly the result of access to equipment, or lack thereof; They have no access to Terminator Armour or heavy tanks such as the Land Raider, for instance. As a result many standard Codex tactics are either impossible to use or simply impractical.

The Chapter's most notable achievement (at least according to Administratum records; there may be many more actions that are waiting to be officially recorded or are still ongoing) is turning the tide of a Chaos incursion on Celestis IX, when an Infantry contingent of the Second Company without supporting assets halted a raiding force of Traitor Guardsmen as they assailed an Adeptus Titanicus facility, having broken a PDF regiment that was already assigned to guard the installation. The Company itself had been in transit to carry out an attack on Tau forces on Nimbosa, but was diverted to repel this assault. Traitor guardsmen captured in the assault spoke of “white daemons” who broke many of their formations with massed Bolter fire before descending upon the survivors in a flurry of Adamantium blades. Indeed, many believed that the Oathkeepers were a much larger force than they actually were – the high rate of aimed Bolter fire gave the distinct impression of entrenched heavy weapons, even to the defenders who were aware that there were none.

Heraldry
Oathkeepers Marines wear white Power Armour with blue-grey shoulder and knee plates (with the exception of Marines in MkVI armour, where the entire lower leg is painted in blue-grey), and backpack exhausts. The Armour belt is golden-yellow, and the trim of the shoulders serves to indicate the Marine's company, with Silver for the First, Yellow for the Second etc. following the normal rules for Codex adherent chapters. The chapter insignia (a stylised three-point crown) is worn on the left shoulder, a specialism designator is worn on the right, and, for all Companies except the First, a squad designator number is worn on the right knee plate.

Notable Marines
Brother Captain Tyrus Belthane - Captain, Second Company, Master of the Watch. Lead the defence of Celestis IX, as well as other actions across the Segmentum Obscurus.