Whats a great WWI or WWII PC Game that includes Air, Land, and sea vehicles?

It needs to have offline play, Something like Aces High, Battlestations Midway/Pacific, and WWII Online. But i dont want to have to pay per a month to play it!! It can have just Air and Naval, or Air and Land, but must have Air flying, with the first person flying view such as in Aces High and whatnot. Does Anyone have any suggestions? :/ Does such a game exist yet??