Castellan Guard

The Castellan Guard are a Space Marine Chapter based on the Eastern Fringe of the galaxy. They are direct succesor's to the Ultramarines Chapter, and are thus strict followers of the Codex Astartes. Their brotherhood has a long and illustrious history as stalwart protectors of humanity, specializing in all forms of defensive warfare.

Recent setbacks however have stained the honor and trust of their Chapter. In a terrible incident on their own homeworld, the Chapter's Chief Librarian secretly had turned to Chaos, along with almost half of the Chapter. In a bloody civil war, the traitors were driven off, but the Castellan Guard had lost many of their loyal brothers and much of their supplies and weaponry. Now, they struggle to rebuild from their losses, and tirelessly hunt their traitor brethren, seeing that their deaths are the only way for the Chapter to redeem itself.