the United States Navy (USN)

The United States Navy (USN) is a branch of the U.S. Armed Forces responsible for naval and maritime defense, ensuring freedom of navigation and national security worldwide. It operates a fleet of ships, submarines, aircraft carriers, and aircraft to project power across oceans, conduct humanitarian aid, and support national interests. The Navy also plays a key role in deterrence, maritime security, and crisis response. As a professional maritime force, it collaborates with allies, advances technology, and maintains readiness to protect U.S. interests on and beneath the sea.