Like the Army, the Navy was officially established by the Continental Congress in 1775. The Navy's primary mission is to maintain and protect U.S. interests at sea.

In times of conflict, the Navy helps to supplement Air Force air power, since Navy aircraft carriers can often deploy to areas where fixed runways are impossible. An aircraft carrier usually carries about 80 aircraft, mostly fighters or fighter-bombers.

Navy ships can attack land targets from miles away with very heavy guns and cruise missiles. Navy submarines allow stealth attacks on our enemies from right off their shores.

The Navy is also primarily responsible for transporting Marines to areas of conflict. The Navy is supported in times of need by the Naval Reserves.