The Department of the Navy is a branch of the United States federal government responsible for naval operations. It oversees the United States Navy and the United States Marine Corps, ensuring national security and maritime defense. The department is part of the Department of Defense and plays a crucial role in military strategy and operations. Headquartered in Washington, D.C., the Department of the Navy is led by the Secretary of the Navy, who reports to the Secretary of Defense. The department manages resources, personnel, and policies related to naval forces, supporting missions both at sea and on land.