I am thinking the Marines adaption of salvaging the light .30s from the downed aircraft and using aircraft machine guns for ground use. A higher rate of fire to use against Banzai attacks was the ticket. Kind of like what the Germans did with their "88s"
"In the beginning of a change, the patriot is a scarce man and brave, hated and scorned. When his cause succeeds, however, the timid join him, for then it costs nothing to be a patriot."