Which pillar is NOT one of the five pillars in the Profession of Arms?

The five pillars of the Profession of Arms are essential components that encompass the core values and principles that guide military professionals. Among these pillars, Military Expertise, Honorable Service, and Espirit de Corps are well-established elements, each contributing significantly to the ethos and operational standards of the military.

While Leadership is undeniably a critical aspect of military operations and effectiveness, it is important to recognize that it is not one of the five foundational pillars in the Profession of Arms. Instead, Leadership is often viewed as a vital skill or competency that is cultivated within the broader framework of the existing pillars.

Therefore, the correct answer indicates that Leadership is not classified as one of the official five pillars, which is why it stands out when examining the core components of the Profession of Arms.