Interesting idea. I don’t have any immediate thoughts about what its advantages and disadvantages might be…but here’s something I’m wonderng about, in relation to the whole stacking problem. One way to look at a real-world territory (during the period of WWII) that contains, let’s say, 99% infantry and 1% other equipment would be to regard it as a highly unbalanced military force. That’s not to say that it could not exist realistically; rather, the point is that it would be the opposite of a combined-arms force. WWII showed that combined-arms warfare had enormous capabilities, provided that the right mix of units was used in the right proportions (depending on the needs of the particular mission) in combination with the right tactics and the right command structure.
A&A recognizes the principle of combined-arms operations by giving some units combined-arms bonuses – which is reasonable enough at first glance. But let’s think about this more carefully for a minute in the light of the stacking issue.
The rules generally state that Unit X and Unit Y, which get a combined-arms bonus if they’re paired, must be paired one-to-one for the bonus to apply. This is reasonable because it would be silly (for example) for a whole bunch X-type units to gain a bonus from the addition of a single Y-type unit. So it’s reasonable that only the paired units within a large force should benefit from such combined-arms bonuses. This can still mean, however, that the large force as a whole is unbalanced, despite the presence of some combined-arms pairings within it. Let’s go back to our example of a highly stacked force consisting of 99% infantry and 1% other equipment, and let’s assume that this 1% consists of artillery. This means we actually have 98% unpaired infantry, plus a 1% of infantry paired with 1% of artillery. It’s nice that 2% of this force gets a combined-arms bonus…but it still leaves the remaining 98% of the force as of plain old unpaired infantrymen, who in principle should be cut to pieces by a genuine combined-arms enemy force having, let’s say, just 50% infantry combined with a mix of tanks, artillery, ground-attack aircraft and so forth. Or at least that’s how it would work in the real world, not in A&A’s rather quirky stacking-oriented combat system.