Which of the following is NOT a responsibility of the Chairman of the Joint Chiefs of Staff?

The role of the Chairman of the Joint Chiefs of Staff (CJCS) is primarily as a senior military advisor and does not include the operational command of military units. Instead, the CJCS provides strategic direction and advice to the President, Secretary of Defense, and National Security Council. This includes significant responsibilities such as advising on military matters, chairing meetings to ensure coordinated strategy among the services, and overseeing the development of military strategy.

Operational command of forces is retained by the individual service chiefs and combatant commanders in the chain of command. This delineation is essential to maintain civilian control of the military, as well as to ensure that the CJCS focuses on strategic and advisory functions rather than direct command tasks. Consequently, the operational command aspect is misaligned with the CJCS's responsibilities, confirming that it is indeed not within their scope of duties.