10-12 soldiers in one area
maybe there will other soldiers in different areas
That's another thing that can be done, you can always have the area that you're confined to, then in other parts of the battlefield you can create dumdums that just perform simple task on mass.
For instance In oblivion if such a system were used, you could have had the main gate where you and martin fight, then in the distance you can have smaller oblivion gates opening, and low-poly dumdums bashing away at each other. You'll be too busy dealing with your own crap to notice that the guys fighting in the distance are morons.