[@kingkonrad]Did you Norwegian? :D 

I can vouch for all those ideas, if not pulling in a few more ideas into the fray; American/foreign fighter pilots fighting in China against the Japanese; Flying Tigers if I'm not wrong. Then again we have British and Commonwealth fighting over Burma or last defense of Singapore?

And just to be crazy, who says we can't have all? Why not have go from theatre to theatre as the war progresses?