All of them. Air Force and Navy pilots penetrate the furthest into enemy territory than anyone else. The Air Force has their Tacp, Pararescue, and Security Police personnel, who are often in harm's way, and it's much the same with units such as the Navy's Construction Battalions, not to mention that, as the Marine Corps does not have certain services (such as a medical corps), those services are provided by Navy personnel, who will be attached to Marine units. Air strikes are called in by Air Force Tacp personnel. So it's not just the Army and Marine Corps.
Marines will fight anywhere in the world, every longitude every latitude. The army sustain ground combat.
Marines corps
Military Diaries - 2002 The Front Line 1-2 was released on: USA: 3 June 2002
They were used to communicate messages back and forth between the home military and the front line military.
Yes, the Air Force is a part of a branch in the Military.
the marine corps sure are a military branch.
executive branch
It is most critical for our military to have, Men and women can both serve their country in each branch of the military.
Department of Defense, which is part of the Executive branch
No, the oldest military branch was the Continental Army founded by George Washington.
You need to be put on the front line right quick.
Braintree Branch Line was created in 1846.
Clevedon Branch Line was created in 1847.