marines are the security forces for the Navy, and an expeditionary force meant to be deployed at a moments notice, but also be able to engage in sustained fighting. the army takes longer to deploy, and generally is not the first into a fight. its complicated.BonsaiK said:So how is that different to the Army, functionally? I still don't get it.asinann said:The marines are basically the navy's infantry.BonsaiK said:For us who are not down with the military lingo, what's the difference between Marine Corps and Navy?