If you opt for something like this, can it be done in conjunction with making defensive military allocations a manual setting?
For example, I send 50% of my planes, and 70% of my tanks against my enemy in an offensive maneuver and 50% of my planes and 30% of my tanks remain in defense. The disparity in offense vs defense could be what determines the amount of infra damage that can be done in the event that an offensive is successful. In the event of a first-strike action, the entire defender military is held in defense.
Something like that. There are more details that'd need to be considered, bu that's the general concept. You get yet another level of complexity and customization.