So it appears that my players are bound and determined to almost always bring along 10-30 extra armsmen with them whenever they go planetside...they seem to really like the idea that they can do this.
My question is how should i handle this when they are facing only a handful of enemies. We're running "Into the Maw", and they next combat is most likely going to be vs. Lady Ash and 2 Battle Servitors on the bridge of the Righteous Path. So that's 5 PCs + XX armsmen vs. 1 Psyker and 2 Servitors.
How would I go about handling this? My understanding is that a mass combat group cannot attack a player or NPC...and vice versa. Have I misread the rules on this? If there's no mass combat group for the armsmen to fight, what should I do with them?