The United States Navy is the naval warfare branch of the U.S. Armed Forces. Established in 1775, it is responsible for maintaining the freedom of the seas and protecting national interests. The Navy operates a variety of ships, submarines, and aircraft, and its personnel are trained for various missions, including combat, humanitarian assistance, and disaster relief. The Navy plays a crucial role in global security and is often involved in international operations and alliances. It works closely with other branches of the military, as well as with allied nations, to ensure maritime safety and stability around the world.