United States Department of the Navy
The United States Department of the Navy was created by the United States Congress on April 30, 1798. It was created in order to give civilian leadership and administration to the United States Navy and the United States Marine Corps. The Secretary of the Navy is in charge of the Department of the Navy, and the Department of the Navy is under the authority of the Department of Defense.
The Department of the Navy is in charge of recruitment, training, organizing, building, and construction for the Navy and the Marine Corps. While the Navy and the Marine Corps both is under the Department of the Navy, they are two separate branches of the military.