In a joint operation, which statement describes the difference between the supported unit and the supporting unit?

• A. The supported unit leads the main effort; the supporting units assist.
• B. The supporting unit leads the main effort; the supported unit assists.
• C. The main effort is shared equally between supported and supporting units.
• D. The supported unit operates independently of the supporting units.

Answer: (A)

In joint operations, the unit with the primary mission leads the main effort, while the supporting units provide the enabling capabilities to help that unit accomplish its objective. The supported unit sets the tempo, directs the key actions, and coordinates the plan, while supporting units contribute essential functions—such as fire support, logistics, or security—without taking over the lead. This arrangement ensures unity of effort and clear command priorities.

So the statement that the supported unit leads the main effort and the supporting units assist is the best answer because it reflects who sets the mission focus and who provides the necessary support to achieve it. The other ideas—sharing the main effort equally, the supporting unit taking the lead, or the supported unit operating independently—do not align with how roles are normally defined in joint operations.