Training Circular TC 3-21.10 is a tool that a commander can use as an aid during training strategy development. The products in this TC are developed to support the company's mission-essential task list (METL) training strategy. This TC provides guidance for commanders, staff, leaders, and Soldiers who plan, prepare, execute, and assess training of the Infantry rifle company. The primary target audience for this training circular is the company commander, and other leaders within an Infantry rifle company. The secondary audience consists of training developers involved in developing training support materials for professional military education (PME). This publication applies to the Active Army, the Army National Guard (ARNG), Army National Guard of the United States (ARNGUS), and the United States Army Reserve (USAR) unless otherwise stated.

This field manual provides doctrinal framework for how infantry rifle platoons and squads fight. It also addresses rifle platoon and squad non-combat operations across the spectrum of conflict. Content discussions include principles, tactics, techniques, procedures, terms, and symbols that apply to small unit operations in the current operational environment.