The Joint Chiefs of Staff have executive authority to command combatant forces?

The Joint Chiefs of Staff (JCS) do not have executive authority to command combatant forces; rather, they serve as advisory bodies to the President and the Secretary of Defense. The JCS provides guidance on military strategy and readiness, but actual command of combatant forces lies with the combatant commanders, who operate under the authority of the President and the Secretary of Defense. The JCS's role is to ensure effective military operations and coordination among the various branches of the armed forces.