Organizational structure of the United States Department of Defense of the Treasury. According to the U.S. Code, the Coast Guard is at all times considered one of the five armed services of the United States. During times of declared war (or by Congressional direction), the Coast Guard operates as a part of the Navy; this has not happened since World War II, but members have served in undeclared wars and conflicts since then while the service remained in its peacetime department. The Pentagon, in Arlington County, Virginia, across the Potomac River from Washington, D.C., is the Department's headquarters. The Department is protected by the Pentagon Force Protection Agency, which
Chief Management Officer of the Department of Defense Chief Management Officer of the Department of Defense The Chief Management Officer (CMO) of the United States Department of Defense (DoD) is the third-in-command of the department after the Secretary of Defense and Deputy Secretary of Defense. The position's purpose is to reduce costs by improving the quality and productivity of DoD's business operations. The CMO's office contains six "reform leaders" in the areas of logistics and supply chains, real property, community services, human resources, and health care, and a Program Executive Officer for IT Business Systems. The office also oversees Washington Headquarters Services and Pentagon Force Protection Agency, and