Department of the Navy

Overview
The U.S. Department of the Navy (DON) is a major component of the U.S. Department of Defense (DOD), consisting of the Navy and the Marine Corps. It is a large and complex organization, whose primary mission is to organize, train, maintain, and equip combat-ready naval forces capable of winning wars, deterring aggression by would-be foes, preserving freedom of the seas, and promoting peace and security.