I can't think of any involved management sims that are also involved strategic wargames.

The reason for this, I suspect, is that for the difficulty it would take to get an economy going in order to field an army, the likelihood of achieving a balanced battle is slim to none and the frustration of watching your hours and hours of work destroyed after a failed skirmish - in an inevitable cascade failure that would likely take another few hours to fully play through - would be horrible.