Marine Corps. It is the only service to keep strictly with its traditions. Every Marine is a rifleman, first and foremost. The Corps has always been an expeditionary force(and always wiil be). It is the only service to wear our country's colors on the uniform(the dress blues). It is the only service in which you EARN the TITLE of MARINE. And your title is capitalized. The short history of the Corps so far is decorated with valor and glory(And why are Marines so y? That's why!). The Corps is the spearhead of any and all Allied ass kicking operation. The Corps is the only service to give its NCO's swords. And there is a bit of history in every piece of Marine Corps uniforms... Ya know what? This link should explain it in detail.
http://millennium.fortunecity.com/redwood/352/usmc7.htm