The battlefield is nothing like StarCraft? Think of SC as a top down model for how a real battlefield map can be. Just give each actor more realistic traits. So no strange Protoss or Zerg creatures! Perhaps base it on a more probabilistic model that treats each contact more as an uncertainty, like it would be under the fog of war.
Suddenly you've got a viable model to use on real tactical maps, that is strikingly similar to SC2, though adapted to real life conditions. That is, if you're able to track - or in the least theorize the position of - each individual "piece" on that board (so soldiers and armour, etc).
A real life soldier does perhaps have some different qualities and abilities than a space marine, but it's still a great starting point for building a more realistic model.
So say, your model looks more like Arma 3... Only top down. Now, I've been in the army, so I can tell you first hand that many aspects of Arma 3 is scarily realistic. Other aspects, not so much. But if you add in some modding, and all that is solved.
It's the same principle. You've already have a base AI to "play the game" and now you adapt each information point to reflect real life instead of game mechanics.
Sure, this sort of AI is brand new, so there would of course be things to iron out. Perhaps you need to use other statistical models to better capture the fog of war. But at the end of it, I think it can be done. Hell, perhaps it can even be used to fight crime. What do I know, perhaps it already is, but nobody wants to talk about it, kind of like how it was such a great moment when it dropped that New Scotland Yards used graph databases to solve cases before it was cool.
