This United States Army manual, Army Techniques Publication ATP 3-94.4 Reconstitution Operations May 2021, provides guidance on reconstitution. It defines reconstitution; describes the planning, training, decision-making, and execution processes; and establishes responsibilities. The intent is to provide commanders facing reconstitution on the battlefield with guidance on how to maintain maximum combat power within situational and resource constraints. This manual is applicable to all theaters and levels of command. The principles are adaptable to all levels of conflict intensity at the operational and tactical levels of war. However, the manual's primary focus is regeneration of battalions and brigades. Although the wording of the text may focus at times on reconstitution of combat units, the principles in this manual are equally valid when commanders reconstitute other units. Chapter 4 provides some considerations unique to reconstituting these other types of units.