Which function is NOT part of the War Fighting Functions?

The function identified as not part of the War Fighting Functions is Public Relations. The War Fighting Functions are a set of core capabilities essential for conducting military operations, which aim to effectively synchronize and integrate various military tasks and activities.

Public Relations, while important in shaping perceptions and maintaining communication with the public and media, does not directly contribute to the combat operations and tactical execution of military strategies on the battlefield. Instead, it falls under the broader category of information operations or civil-military relations.

In contrast, Sustainment addresses the logistics necessary to maintain forces in the field, ensuring that supplies, equipment, and personnel are available to support operations. Movement and Maneuver refer to the strategic and tactical movement of forces and assets to execute operational plans effectively. Mission Command emphasizes the leadership and command function required to make timely decisions and adapt to changing situations during operations. Each of these functions directly contributes to military effectiveness, whereas Public Relations serves a different operational support role.