How do you go to battle?

[Narwan]

Division is to big, it will go over the max number of units allowed. Brigade is about the biggest force you can get. The dutch mech brigade had an artillery battallion, two mech infantry battallions, an armor battallion and an engineer company. The mech and armor battallions are big ones too.
Add to that some arty from corps level, heavy AA assets to represent area defense, a dozen or so aircraft and a couple of helicopters and you're set.
That's about as large as the game will allow.

Narwan