Chairman of the Joint Chiefs of Staff
Although the office of Chairman of the Joint Chiefs of Staff is considered very important and highly prestigious, neither the chairman, the vice chairman, nor the Joint Chiefs of Staff as a body has any command authority over combatant forces. The Goldwater–Nichols Act places the operational chain of command from the president to the secretary of defense directly to the commanders of the unified combatant commands. However the service chiefs do have authority over personnel assignments and oversight over resources and personnel allocated to the combatant commands within their respective services (derived from the service secretaries).
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