Which command structure is characterized by no designated single force commander?

The parallel command structure is characterized by multiple national commanders retaining authority over their respective forces, which operate semi-independently. In this arrangement, there is no single designated force commander who has overall control; rather, each nation has control over its units while coordinating efforts to achieve a common objective. This structure can foster cooperation and unity of effort, while allowing individual nations to maintain their command autonomy and military traditions.

In contrast, the lead nation command structure often designates a single nation to take the command responsibility over the combined forces, providing centralized control and unity. The integrated command structure may involve blending personnel and resources from different nations under a common command, effectively creating a cohesive team. The joint command structure typically refers to a unified command across different branches of military services within a nation, emphasizing collaboration and coordinated operations.