Fort Campbell opened in early 1942, and was immediately put to use training three armored and one infantry division, in support of the war effort in Europe and the Pacific. After World War II, Fort Campbell continued to grow, and in 1956 the 101st Airborne Division was reactivated, with Fort Campbell as their home. Other tenant units at Fort Campbell include the 5th Special Forces Group, the 160th Special Operations Aviation Regiment (SOAR), and the 57th Explosive Ordance Disposal Group.

Officially known as Joint Base Lewis-McChord (combining the Army's Fort Lewis and the Air Force's McChord AFB) the original Army installation was founded in 1917. Joint Base Lewis-McChord (JBLM) tenant units for the US Army include the US Army I Corps, including numerous infantry, medical, engineer, and support personnel. JBLM contains more than 86,000 acres with more than 25,000 soliders and civilians working on base.

Originally founded as a local municipal airport, the Army built a base at the field in 1940, and was used to train both bomber and anti-submarine aircrews during World War II. From 1949-1967 the airfield was known as Hunter Air Force Base, and was used by the Strategic Air Command until the Army took over in 1967.

Today Hunter Army Airfield is part of Fort Stewart, and as such primarily houses the aviation units of the 3rd Infantry Division. Hunter Army Airfield also allows the 3rd Infantry Division to quickly and efficiently deploy units worldwide

Covering approximately 251 square miles, Fort Bragg is the home to the US Army Special Forces and the US Army Airborne Forces. Established in 1918, Fort Bragg become the home for unconventional warfare after World War II. Also stationed at Fort Bragg are the headquarters for the US Army Forces Command and the US Army Reserve Command.

Fort Benning is one of the US Army's busiest facilities. It sits on the border of Georgia and Alabama, covering nearly 200,000 acres. Fort Benning is the primary training installation for all US Army infantry personnel. Enlisted infantry recruits undergo Basic Combat Training (BCT) and Advanced Individual Training (AIT) in a combined fourteen-week course called One Station Unit Training.