United States Armed Forces

The federal military forces of the United States comprise the Army, Navy, Marine Corps, Air Force, Space Force, and Coast Guard. They operate under civilian authority and are organized for national defense and other missions authorized by law.

United States Army: The land warfare branch of the United States military. It is the largest service by personnel and conducts ground operations.
United States Department of Defense: The federal executive department responsible for coordinating and overseeing national defense. It directs the military departments and most armed services.
Continental Army: The army established by the Continental Congress in 1775 to fight the American Revolutionary War. It was the institutional predecessor of the United States Army.
United States military logistics: The planning and delivery of supplies, personnel, equipment, and services for military operations. Logistics sustains forces across global distances and prolonged operations.
United States Public Health Service Commissioned Corps: A uniformed federal service of health professionals within the United States Public Health Service. Its uniformed status does not make it one of the armed forces.
United States Navy: The maritime service responsible for naval warfare and operations at sea. It provides sea power and operates the fleet.
President of the United States: The elected head of the United States executive branch and commander in chief of its armed forces. The Constitution places the armed forces under presidential command.
United States Constitution: The supreme law establishing the structure and powers of the United States government. Its provisions divide military authority between Congress and the president.
Nuclear deterrence: A strategy that seeks to prevent attack by threatening unacceptable nuclear retaliation. Strategic forces support the United States’ nuclear deterrent.
United States Merchant Marine: The civilian fleet of United States-flagged commercial vessels and their mariners. It supports sealift but is not a military service.

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