No. It's a sixth branch separate from the existing Army, Navy, Marines, Air Force, and Coast Guard.
Air force
The Army initiated the Army Air Corps which changed into the United States Air Force after World War II. Viper1
The Air Force is the youngest military organizationThe Air Force was a part of the Army, and was called the Army Air Corps, until 1947.
The U.S. Air Force was once the Army Air Corps.
The Air Force originially started as part of the Army (Army Air Corp) during WWII. It became a separate branch after the end of WWII.
The US Air Force
The US army has no fixed wing aircraft. This was part of the 1949 agreement that separated the Air Force from the Army. Air Force gets all fixed wing aircraft, Army gets helicopters.
It's part of the US Army's function to use force and occupy territories when ordered to do so.
No, Seals are part of the Navy, Delta Force is part of the Army They can if they choose not to continue being a SEAL when it is time to reenlist, and enlist in the Army Delta force, but then they would be Ex-Navy SEALs. Besides, SEAL's dont go for Delta Force, they go for DevGru.
Army,Airforce & Navy
Overseas, in Italy, as part of the 12th US Army Air Force.
The US Air Force was originally part of the US Army as far back as WWI. Then It was the Army Air Corps. After WWII the Air force became a separate branch of the service in 1947.