What is the primary document that governs the Army's operational structure?

The primary document that governs the Army's operational structure is the Army Doctrine Publication (ADP) 1. This publication outlines the fundamental principles and concepts that guide the Army's operations, providing a foundation for understanding how the Army conducts its missions and organizes its forces. ADP 1 serves to communicate the Army's vision, mission, and the professional commitments of its soldiers and leaders.

The importance of ADP 1 lies in its role as a cornerstone for all Army doctrine and operational procedures, ensuring that soldiers at all levels understand their responsibilities and the overall strategic objectives of the Army. This document helps in fostering a common understanding of the Army's aims and the methods used to achieve them, which is essential for cohesion and effectiveness in diverse operational contexts.

Other options, while related to Army structure and operations, do not serve as the primary governing document. For instance, Army Field Manual (FM) 1 provides detailed tactical guidance but is secondary to the overarching principles established in ADP 1. Army Regulation (AR) 1 and Army Operations Manual (AOM) 1 do not encompass the comprehensive operational framework that ADP 1 provides, making it the correct choice in this context.