I can,t find the "Historical Battles" option with-in the co-op mode.

i can't either.

you've either got to complete the campaign single player first or go on campaign mode with two wii remotes or whatever controller you have connected.

My thinking was the same as yours. I have completed the campaigns and then gone back and become an ACE at most to see if upgrading the planes was the key. Have also now completed all the multi player missions. Guess what still can't find "Historical Battles"

I can't believe this.

It's so stupid!