Would the war teach Britain and the United States the value of mass carrier air strikes?
Short answerYes: a joint carrier force would provide early operational lessons and could drive much larger follow-on carriers by 1942.
NotesAn Anglo-American carrier task force would become a major learning environment. Early battles could reveal the requirements for mass air strikes, fighter protection, scouting, and multi-carrier coordination before the historical Pacific campaigns. Both navies would take lessons from the same operations while bringing different prewar practices to the force. By 1942, those lessons could influence much larger carrier designs comparable in scale to the later Midway or Malta concepts.