Who is the principal military advisor to the president, the Secretary of Defense, and the National Security Council?

• A. Vice Chairman of the Joint Chiefs of Staff
• B. Chief of Staff of the Army
• C. Chief of Naval Operations
• D. Chairman of the Joint Chiefs of Staff

Answer: (D)

The person who serves as the principal military adviser to the president, the secretary of defense, and the National Security Council is the Chairman of the Joint Chiefs of Staff. This role is the senior military officer in the U.S. armed forces and is specifically designated to provide unified military advice to civilian leadership and key policymakers. The chairman chairs the Joint Chiefs and coordinates input from the service chiefs, ensuring recommendations reflect the whole armed forces rather than a single branch. The other positions—service chiefs or the vice chairman—advise their own services or act as deputies, but they are not the designated primary adviser to the president, the secretary of defense, and the NSC.