Which command structure is characterized by integration across multiple services?

The most appropriate command structure characterized by integration across multiple services is Unified Command. A Unified Command brings together resources and personnel from different branches of the military, such as the Army, Navy, Air Force, and Marine Corps, under a single commander. This structure enhances operational efficiency and coordination by allowing for comprehensive strategic planning and execution across various military services.

This command structure is crucial for joint operations where seamless collaboration is necessary to achieve common objectives. Unified Commands are established to address specific regional or functional areas, such as United States Central Command (CENTCOM) for operations in the Middle East, which exemplifies how different military branches can work together under a unified command to respond to threats or crises effectively.

While Joint Task Forces also involve multiple services, they are typically temporary and formed to accomplish a specific mission, thus limiting their application compared to the more enduring nature of Unified Commands. Combined Commands involve agreements between allied nations and their respective services, which introduces diplomatic considerations that differ from the internal integration seen in Unified Commands. Single Service Commands are restricted to one branch and, therefore, do not embody the integration necessary across services.