A campaign...

[goomohn]

With small maps say 800x2000 meters advance and assault operations can be accomplished. Battalion sized forces. ~1.5:1 ratio on assault ~1.25:1 on advance. You can even edit in a second line defense of fortifications when the assaulting force has tripped a certain point (say over the horizon or through the woods).

I'd keep no man's land pretty low 400m open, 240m forested, 80m inclimate weather; because of the shorter map. All forces should probably be on the map by the 2nd battle. I said citadel to bagration because those are fairly advanced forces on the central front. The Germans and Soviets attacked and counterattacked in pretty equal measure till bagration and the breakthrough.