SaburÅ Sakai commented that American style Football gave us a tremendous advantage in combat, especially air combat, against the Japanese. He said that each person having a role to play an playing it unselfishly for the good of the whole wasn't a comcept that the Japanese understood from a warriors point of view. The Japanese viewed aerial combat to be an extension on samurai combat and approached it seeking individual honor.
(I think it was SaburÅ Sakai, I might be wrong.)