What does a Joint Force Commander primarily manage?

A Joint Force Commander primarily manages combatant command. This role encompasses the responsibility for the overall mission and effectiveness of joint military operations, which includes setting strategic direction, allocating resources, and ensuring that all aspects of the mission are integrated across various service branches and components. This leadership position is crucial in executing operations that require coordination and cooperation among different military entities toward common objectives.

In the context of the other choices, while unit morale, operational planning, and logistics coordination are important elements within the broader scope of military operations, they fall under the operational and tactical aspects of command. The Joint Force Commander, however, focuses on strategic oversight and the integration of forces, which is why combatant command is the primary area of management for this role.