Which FM details the responsibilities and authority of NCOs?

The correct choice, FM 7-22.7, is crucial because this field manual specifically addresses the roles, responsibilities, and authority of Non-Commissioned Officers (NCOs) within the Army. FM 7-22.7 provides guidelines and standards that govern the conduct and performance of NCOs, thus serving as a foundational document for understanding their leadership roles, training, and overall contribution to maintaining military effectiveness. It comprehensively covers the expectations placed upon NCOs and details how they can effectively lead and mentor soldiers.

In contrast, other referenced field manuals focus on different areas. For example, FM 3-25.26 pertains to map reading and land navigation, while FM 6-22 appendix B relates to Army leadership, but does not specifically detail NCO responsibilities. FM 4-25.11 is centered on first aid and medical training, which does not directly address NCO duties or leadership roles. Therefore, FM 7-22.7 stands out as the authoritative source on NCO responsibilities, making it the correct answer.