Who is responsible for the operational command of U.S. military missions?

The Secretary of Defense is responsible for the operational command of U.S. military missions as part of the broader chain of command that connects the President to the military. This role includes overseeing the military branches and ensuring that military operations align with national policy objectives. The Secretary of Defense is the principal defense policy advisor to the President and has the authority to execute military operations and manage the Defense Department's resources.

This authority to direct military operations includes important responsibilities such as planning missions, issuing orders to combatant commanders, and coordinating with other elements of national security policy. While the President holds ultimate authority as Commander in Chief, the Secretary of Defense manages the day-to-day operations and implementation of military directives, making this position crucial for operational command.