The Army. The Marines typically fought in the South Pacific.
The US Army fought more because there were more of them, but the US Marines also fought against the Germans in France.
About 20,000
http://www.britannica.com/dday
I'm not in a position to answer, but do you mean Army, military, or marines?
The Marines are Marines. The Army has Army Special Forces AKA Green Berets.
Army by far. Marines are real men.
Always. And the Army often come in to help the Marines.
The Royal Marines are part of the Royal Navy and nothing to do with the Army.
Army
The USAF/USN fought their "Air" war over North Vietnam. The US Army/Marines fought in South Vietnam. Covert operators (Special Forces, Seals, Ravens, etc.) fought in Cambodia & Laos.
Marines
Individual Marines, or the Corps as a whole? The Marine Corps is extremely stingy with its medals. Things that in the Army will get you an Army Commendation Medal won't get you any medals at all in the Marines. The Marines also don't have a lot of the service ribbons the Army has.