"Grunt" is a term used to denote infantry personnel in both branches.
Army, Soldier Navy, Sailor Air Force, Airman Marine, Marine
become a us marine
Every recruit is trained as a grunt, whether they want to be a cook, or an actual grunt. A Scout Sniper fresh out of sniper school, has the knowledge of Marine Corps infantry.
Marine clothing can be purchased from companies such as Grunt, MarinePride, and US Marine Corps Apparel. These are websites that Marine clothing can be purchased from.
An Army installation is called a post. Base is used by the Air Force and Marine Corps.
In the Army or Air Force it's called Leave In the Navy and Marine Corps it's called Liberty.
G.I., Grunt
Vietnam War: Grunt=Infantryman (foot soldier). WWI infantrymen were called doughboys. WWII infantrymen were called dog faces. grunt: moan
Of the list that you have provide, the marine corps infantry is the best.
marine
A soldier is someone who is in the army. A Marine is a person who is serving in the United States Marine Corps. What you are probably referring to is an infantryman or someone who is a member of the Marine Corps Infantry.
A soldier in the U. S. Army who fights with a rifle is called a weaponeer. A U.S. Marine is called a rifleman.