You have to do what the Germans did, using French ATG, the 47mm ATG of the German OOB is french and teh Germans quicly learned how to use it..
Planes, can wipe the French tanks, a German player should always be allowed to have tons of planes and the French very few AA.
You can also use 88mm guns or 105mm field guns.
this is how the German did.
An infantry assault is near useless if you are attacking, as a German you are supposed to attack.
To give you an idea I am playing a pbem battle with 11500 points of French Vs 20000 points of Germans, the German side can have up to 30 planes!!! and i have only 6 AA gun for a max size map.
I am doomed.
