I hit an interesting situation where an opposing coalition built railroad guns and piled them full of AA with interceptors overhead. The stack quickly became a bulldozer plowing through everything you threw at it. It didn't help that I was Southern US and had to transport across the ocean to tackle the problem. Just curious if others are having similar problems against these. If they are the new OP unit, perhaps they could be limited to only moving in provinces with level 3 infrastructure. This would at least keep them out of backwater provinces without an existing rail system heavy enough to support them. I even hit them with level 2 rockets only to kill a couple supporting caste members but di little against the guns themselves.
"A good plan, violently executed now, is better than a perfect plan next week." - General George S. Patton, Jr.
"Do, or do not. There is no try" - Yoda
"Do, or do not. There is no try" - Yoda