Lemme talk on this, briefly.
For players who have colonies, I'm gonna try to operate on some kind of rule of thumb that seems reasonable. If you don't tell me what the size of your colonial garrison is, or specify troop placements for your colonies, I think what I'm gonna say is that you have colonial troops who are irregulars in some aspect - whether they're Belgian Congo Public Force mercenaries or poorly trained native conscripts depends on who you are - who will try to stop an invading army or put down a rebellion, but can't be relied to fight as long or as well as your professional soldiers.
But I think the upshot of that is that if you have colonies you should probably tell me how your forces are distributed in them and the home country