Which command relationship provides guidance to subordinate commands without direct control?

The correct answer is Operational Control (OPCON) because this command relationship allows a commander to exercise authority over subordinate forces, enabling coordination and guidance while not necessarily involving direct control over the means and processes used to achieve desired outcomes. In practice, OPCON permits commanders to assign tasks, provide direction, and allocate resources, fostering effective cooperation with subordinate commands.

OPCON is often used in joint operations where forces from different services or nations may be working towards a common operational goal but retain some degree of autonomy and authority in their own operations. This balance is crucial in scenarios requiring flexibility and integration across various units without subsuming their operational independence.

The other options, while related to command relationships, do not fit as neatly in this context. Tactical Control (TACON) is characterized by more direct control, allowing commanders to direct forces in assigned tactical missions. A support relationship specifies the nature of support one unit provides to another, which involves a degree of dependency rather than just guidance. Supervisory Control is less commonly defined in military doctrine and does not represent a standard command relationship compared to OPCON, TACON, or support. Therefore, OPCON stands out as the most fitting answer for offering guidance while maintaining a level of operational independence among subordinate commands.