Which of the following is NOT a type of joint force?

The correct response identifies "Advisory Command" as not being a type of joint force. In the context of military operations, joint forces are typically structured under specific command types that coordinate actions among different branches of the armed forces to achieve unified objectives.

Subordinate Unified Command, Joint Task Force, and Combatant Command are all recognized organizational structures within the joint force framework. A Subordinate Unified Command operates under a higher authority, focused on specific missions or geographic areas. A Joint Task Force is assembled for a specific mission, often with a designated timeframe and unique operational capacities that require the integration of multiple services. Combatant Command denotes a major organizational component of the U.S. military that has broad authority over a geographic area or functional mission.

In contrast, "Advisory Command" does not conform to the established terminology and structure for joint forces. It may imply a role that provides advice or assistance without the formal command and control inherent in true joint force designations, which focus on operational execution and strategic objectives in a cohesive manner. This distinction reinforces why "Advisory Command" is the correct answer as the outlier in this context.