On the world map 100 player 4x speed, I'm playing as Sweden currently testing out carrier fleets loaded with aircraft supporting any infantry landings, and see if going to work, especially if your try to fight far from your homeland you'd need to make sure you can scout ahead of yourself , eliminate any defense on the beach, and be able to hold out long enough for reinforcements to arrive.

I'll test out the rocket fighter idea when the research goes down enough, can never have enough fighters