The day after tommorow I will be playing as the axis for the 2nd time and I need some advice for a counterstrategy for Germany when attacking Russia. Last time, my opponent simply made an airplane every turn  + infantry, and just kept stacking infantry and creating dead zones which he could take back easily with 10 - 15 infantry with fighter and bomber support. At the same time, as Germany, I just could not keep my front lines supplied with enough units. I tried to do this with infantry alternated by tanks to try and have them at the front lines at the same time to create a stack of my own, but this takes far too long. How do you keep your frontlines filled while at the same time prevent getting slaughtered after each territory you take?