Has anyone here played the Close Combat series of games?
They're amazing especially when your men run out of ammo and your men are crawling about looking for weapons, it added an extra dimension of play.
Your game could include the possibility of units withdrawing/rallying at various points for resupply, for long battles anyway...
Or scavenging/pilfering supplies from the dead...
The Close Combat series also gave each soldier an individual set of stats for their personality, which made each game unique.