Fester,
Very good start on the map!
I want to suggest something to help with the cv's. Include a lake in the center of each homeland with rivers to various points. Perhaps two or three ports can be located in these lakes.
Just for fun I included also an airfield in the center of each lake to help defend the ports.
If a part of a map is being overrun then a sneaking cv can come up from behind the conquers and re-take a base or two stealthily. Or just help to defend a base under attack.
Also imagine sneaking a cv into an enemy lake

Anyway, pictures are worth more than words, so here ya go...
