General assigns orders
Captain organizes and commands men in combat
Deserters (AKA the guys who don't follow orders) are marked for execution and are highlighted for the Captain to kill
Oooorrrrr
Generals in back giving orders to guys upfront, guys up front following or disobeying those orders. (Following orders give points, which you can use to sustain healthiness in the trenches. If you disobey however, you may get sick, hungry, or exhausted because of a lack of funds. And yes, WWI didn't work like that, but it gives people incentive to follow orders!)
by points I mean money/marks/lods of dosh, as you need to keep yourself fed and stuff by buying stuff in your dugout!