A Marine is a member of the US Marine Corps. They're a seperate branch of the US military. Our five branches are: - Army - Navy - Air Force - Marine Corps - Coast Guard The Marine Corps is the all-in-one branch of the military; they've got aviation (jets, helicoptors), tanks and light armor, infantry, and small boats. They're actually a department of the Navy--that's where their paychecks and funding comes from--but you can join them as a seperate service. They use seperate everything. Their rank system is a combination of Army, Navy, and a few British/international ranks here and there--ranks like Gunnery Sergeant are from their traditional and original role of being on Navy ships. They speak like the Navy ("bathroom" is "head," "floor" is "deck," etc.). Their uniforms are clean--they don't wear patches like the other branches, only their name, rank (at the collar/on the shoulder if dress uniform), and the "Marines" tape. Their training is the longest of the branches--I think it's thirteen weeks of basic training as opposed to eight(?) in the Army. They train all their members to be riflemen before sending them to become tank drivers, pilots, and other specialties, whileas the others simply teach them how to qualify. Their entire mentality is different.
Well this is my opinion. I think that "beyond marine" would be something with more vigorus training, such as an Army Ranger or a Navy SEAL.