the name of the game is "Combat Flight Simulator 2" by Microsoft. It deals with the theatre of war in the Pacific.
Therefore 2 "Corsairs" and a smoke trailing Zero is to on the package (at least in the German edition).
There is an expansion with the name "Combat Aces - the ultimate WWI air war expansion for Combat Flight Simulator 2"
That means I had to pay for two games. >
In the past we had mostly one game with expansion.
I remember "Secret Weapons of the Luftwaffe" and others of the good old DOS-times.
You can find more info at www.justflight.com
I am still testing the game(s). It is a bit disturbing to see a Japanese opening if I want to fight WWI battles but I hope it is not so bug-loaded like RB2 (German ed.) was.