Which FM covers the history of the NCO?

The correct answer is FM 7-22.7, which specifically focuses on the history, role, and responsibilities of Non-Commissioned Officers (NCOs) within the U.S. Army. This field manual provides a comprehensive overview of NCO duties, leadership principles, and the evolution of the NCO corps, making it a vital resource for understanding the significance of NCOs in military operations and structure.

Understanding the history of the NCO is crucial for soldiers, as it helps them appreciate the traditions, values, and leadership qualities that have been integral to the Army's success throughout its history. By studying FM 7-22.7, individuals can grasp the lineage of the NCO role and apply its lessons in contemporary military practices, thereby enhancing their leadership skills and effectiveness as NCOs.

The other choices do not focus specifically on the history of NCOs: FM 6-22 provides guidance on leadership and counseling but does not concentrate on the historical aspect; FM 7-100 deals with the evolving concepts of warfare and adaptive capabilities rather than NCO history; and FM 3-100 covers joint operations and the Army's role in joint warfare, which is unrelated to NCO-specific history.