This may have been brought up already as i have not read every post in this thread..

But...
Depending on how wide the rivers are, as shown on the map in the first post there are manned guns on either siede right on the bank. If one side holds 1 side of the bride and another side the other, then anyone can get on, jump in the gun, lay waste to the opposite side and drive an M3 over. I lovee the idea dont get me wrong, but what i just stated would make it a little too easy to capture an opposing side where terrific fights could take place.
Again this might have been brought up already, and if so i am sorry.
Just my .02
