Rathelon
Prince
IMHO (being worth 1/50 of a dollar) if you are invading across the water in the modern era, the most important unit is going to be spies. You need all three of them knocking out the railroads in a 3 tile radius around your landing spot. Or the counter attacks will kill you.
Bingo. I still need to check the xml to see if there is a way to allow bombers to destroy roads/railroads. Those have always been major objectives in post-industrial wars.