Which command relationship defines the authority to command and employ forces to accomplish a mission?

The choice of Operational Control is the correct answer because this command relationship clearly delineates the authority given to a commander to direct forces and employ them effectively to accomplish specific missions. Operational Control allows for the detailed execution of military operations, facilitating the coordination of forces across different units to achieve strategic objectives. It encompasses the authority to organize and deploy forces, thus enabling the commander to manage resources, assign tasks, and ensure proper engagement in operations.

Operational Control goes beyond merely announcing who is in charge; it encompasses the direct assignment of tasks and capabilities. This level of control is vital in a dynamic battlefield environment where responsiveness and adaptability are essential for mission success.

In contrast, Tactical Control provides a more limited authority that allows the commander to direct specific tactical units, but it does not encompass the broader mission-related command responsibilities found in Operational Control. Organizational Control typically refers to the structure and relationships of forces, focusing on command structures rather than the authority to employ them. Positive Control generally indicates a level of oversight or oversight function rather than the broader command authority needed for mission accomplishment.