2-32. Army personnel recovery is the military efforts taken to prepare for and execute the recovery and reintegration of isolated personnel (FM 3-50). Isolation occurs through enemy action, disorientation, or environmental conditions. The commander assigned an AO is responsible for recovering and returning isolated persons within that AO to friendly control. Large-scale combat operations require an analysis of the mission variable before triggering an immediate response. If immediate recovery is not undertaken or is not successful, the unit conducts detailed planning and executes deliberate recovery. Army forces support external supported recovery of joint task force components, interagency organizations, and multinational forces. (See FM 3-50 for additional information on Army personnel recovery and the operations process.)