I used to give up on games where I fell hopelessly behind in techs. But after reading about some of the fantastic efforts in this forum I've gotten more daring. Yes, you can beat infantry with rifles and cannons. As a result I finish more games. The AI is really stupid and there are many tricks to beat a superior technological opponent. But there is one that I haven't figured out yet and was wondering if there is a trick for this one. COMBUSTION Once an AI has this, they own the sea until you get it. Volume doesn't beat it. Airships don't beat it. I usually just assume all my sea resources are doomed and I should protect my coastal cities for the inevitable landing. How do you deal with an AI that has it when you don't and not going to war is not an option?