Which of the following is NOT a principle of war?

Leadership is not typically listed as one of the established principles of war. The principles of war are foundational concepts that guide military operations and strategy, helping commanders make decisions that effectively align their efforts to achieve desired outcomes in conflict situations.

Unity of Command stresses the importance of having a single commander for any given operation to avoid confusion and ensure coordinated action. Perseverance refers to the need for sustained commitment to achieve objectives, especially in the face of adversity. Economy of Force emphasizes the efficient allocation of resources, ensuring that the right amount of force is applied to achieve the desired end result without unnecessary expenditure of personnel and equipment.

While leadership is undoubtedly a vital component of military effectiveness and command, it is considered more of a quality or characteristic of individuals rather than a structural principle guiding military action in the way that the other options represent foundational tenets of warfare.