United States of America

The United States Marine Corps (USMC) is a branch of the United States Armed Forces responsible for providing force projection from the sea, using the mobility of the U.S. Navy to rapidly deliver combined-arms task forces. It is one of seven uniformed services of the U.S. In the civilian leadership structure of the United States military, the Marine Corps is a component of the Department of the Navy, often working closely with U.S. naval forces for training, transportation and logistic purposes; however, in the military leadership structure the Marine Corps is a separate branch.

The United States Army is the branch of the United States armed forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military and is one of seven uniformed services. The modern Army has its roots in the Continental Army which was formed on June 14, 1775, before the establishment of the United States, to meet the demands of the American Revolutionary War. Congress created the United States Army on June 14, 1784 after the end of the war to replace the disbanded Continental Army. The Army considers itself to be descended from the Continental Army and thus dates its inception from the origins of that force.

The United States Navy (USN) is the sea branch of the U.S. Armed Forces. It is one of the seven uniformed services of the United States.

The United States Air Force (USAF) is the aerial warfare branch of the U.S. armed forces and one of the American uniformed services. Initially part of the United States Army, the USAF was formed as a separate branch of the military on 18 September 1947.