During the Viet War, the US Army had priority. USMC recruiters often walked amongst the new inductees (draftees) and selected the men that they wanted for the Marines; "you you and you, stand over there...you're going into the Marine Corps."
The USAF and USN had a waiting list for joining (as did the Army & Air National Guards & the USCG).
Steady employment.
Yes.
He was an Artillery Officer.
No, but you should capitalize American. If the specific branch of the military is named, it should be capitalized.
The US Marine Corps is a branch of the US Military. It is a part of the Department of the Navy. The commandant services on the Joint Chiefs of Staff.
Steady employment.
The Executive branch drafts the budget and the Legislative branch approves it or makes changes to it.
No, it is independent of the military. It does use military people & equipment to assist. The first NASA astronauts were military pilots.
Marines corps
ideas and thoughts are often unfolding in first drafts
It has always been an all volunteer military with the only notable exceptions were drafts.
IIRC the USAF
legislative branch
Yes, the Air Force is a part of a branch in the Military.
Revision.
the marine corps sure are a military branch.
executive branch