hiya
Yeah,read storm of iron and the heresy books .The one where the luna wolves assult the davinite moon )and the one where Horus takes advantage of the istavan assult to rid himself of his unloyal factions.If i screw my eyes really tight I might rememmber what ther'e called or run up stairs and look at the book shelf !
Off the top of my head tho-
Some fluff sugested it broke the walls on terra during the seige,it worships nurgle,its part of the Death Heads legion(or was,its dead now) their colours are black with red/gold trim.
If you want more info, let me know and i'll delve into the spare room of knowled
ge.