Secretary of Defense

Secretary of Defense is the principal defense policy advisor to the President of the United States and leads the United States Department of Defense. The position was created by the National Security Act of 1947, which unified the War Department and the Navy Department under a single national military establishment. As a Level I position, the officeholder is a key member of the Cabinet of the United States and the National Security Council.

History and establishment

The position was established by the National Security Act of 1947, signed by President Harry S. Truman, as part of a major reorganization of the United States Armed Forces following World War II. This act merged the previously separate War Department and Navy Department into the National Military Establishment, which was renamed the United States Department of Defense by the 1949 amendments to the act. The first person to hold the office was James Forrestal, the former United States Secretary of the Navy. The creation of the role was heavily influenced by the interservice rivalries observed during the war, such as those between the United States Army and the United States Marine Corps, and aimed to provide unified strategic direction. Key legislative milestones that further defined the office include the Goldwater–Nichols Act of 1986, which strengthened the authority of the Chairman of the Joint Chiefs of Staff and clarified the chain of command running from the President through this office to the Combatant Commands.

Roles and responsibilities

The officeholder exercises authority, direction, and control over the United States Department of Defense, which includes the United States Army, United States Navy, United States Air Force, United States Marine Corps, United States Space Force, and the United States Coast Guard (when it is operating as a service in the Navy Department). Key duties include formulating broad defense policy, preparing the annual defense budget, and overseeing the National Security Agency and the Defense Intelligence Agency. The office also supervises major acquisition programs like the F-35 Lightning II and establishes policy for the United States nuclear command and control system. Furthermore, the office plays a critical role in international engagements, including through treaties managed by the North Atlantic Treaty Organization and security agreements with allies such as Japan and South Korea.

Appointment and succession

The officeholder is appointed by the President of the United States with the advice and consent of the United States Senate. By federal law, the individual must be a civilian who has not served in active military status for at least seven years, a provision waived only once for George C. Marshall in 1950. The nominee typically appears before the United States Senate Committee on Armed Services for confirmation hearings. In the United States presidential line of succession, the officeholder is sixth, following the Secretary of the Treasury. Should the office become vacant, the Deputy Secretary of Defense assumes the role of Acting Secretary, as occurred when David O. Cooke served briefly in 1989. Other statutory successors include the Secretaries of the Army, Navy, and Air Force, in that order.

List of Secretaries of Defense

Since the office's creation, there have been 28 confirmed officeholders, serving under 14 different presidents from Harry S. Truman to Joe Biden. The longest-serving was Robert McNamara, who served over seven years under Presidents John F. Kennedy and Lyndon B. Johnson during the Vietnam War. Other notable figures include Caspar Weinberger, a key architect of the Reagan administration's military buildup during the Cold War, and Donald Rumsfeld, who served two non-consecutive terms under Presidents Gerald Ford and George W. Bush, notably during the September 11 attacks and the subsequent War in Afghanistan. The current officeholder, Lloyd Austin, a retired United States Army general, is the first African American to hold the position.

Relationship with the military and other departments

The officeholder is the civilian leader of the United States Department of Defense and maintains a critical relationship with the uniformed military leadership, principally the Chairman of the Joint Chiefs of Staff. This relationship is designed to ensure civilian control of the military, a principle enshrined in the United States Constitution. The office works closely with other Cabinet departments, particularly the Department of State on foreign policy and the Department of Homeland Security on domestic security matters. It also coordinates with the Director of National Intelligence on intelligence matters and with the Congress through committees like the House Armed Services Committee. Furthermore, the office interacts with international bodies such as the United Nations Security Council and allied defense ministries.

Category:United States Secretaries of Defense Category:United States Department of Defense