The dearth of Rogue Trader cosplays historically meant that we didn't really have an official place to put them in the forum line-up. That has now been rectified. Accordingly, the board formerly known as Imperial Guard has been modified to say "Imperial Guard & Imperium".
Space Marines and Inquisition, despite being servants of the Imperium of Man, still have their own board.
Obscurus Crusade Webmaster