Well, when you can't hold certain cities, the German will be given 'Karl' 60mm Mortars, which has 18a, 8d, 6h, 6f, 2m, all as road, ignore city walls.
As Captain Nemo described, your best assault weapon can only scratch it, and each turn two of your best defense units will be blown off by each Karl.
There will be two Karls against your Caucasus region, and one against Leningrad.
Well, I don't think the Karls are tough. I just lure the Karl to a marsh or minefield and use a vet cruiser--my cruiser is yellow when Karl is dead!
How to kill it?
