Alright, listen up troops, because this one is important!
It has recently come to my attention, through rather unimportant yet incredibly important means, that one of you... IS A TRAITOR! Please cue the dramatic music!
m.youtube.com
Now, I know what you're all asking yourselves. "Commissar Knochenmus, how can you be sure that this information is even correct? And how could such a person have ever passed the regiment's rigorous purity AND loyalty tests? Not to mention, why would you mention this sort of thing, mere moments before we're supposed to be facing traitor forces?"
Well, it's for two reasons really. The first one being so that each and every one of you, will be on the look-out for signs of possible traitorous activity! You never know when a filthy Commi- *COUGH!* A filthy Xeno or Choas infiltrator could be plotting to kill you from afar!
The second, is so that you all know too keep an eye out for oddities when we do our surprise Field Kit Inspection, right now! So present arms and armour for Field Kit Inspection, Lads!