This United States Army and Marine Corps manual, Army Techniques Publication ATP 4-31 / MCRP 3-40E.1 Recovery and Battle Damage Assessment and Repair (BDAR) November 2020, provides techniques on how recovery and battle damage assessment and repair (BDAR) are employed during operations. The principal audience for ATP 4-31/MCRP 3-40E.1 is all members of the profession of arms. Commanders and staffs of Army headquarters serving as joint task force or multinational headquarters should also refer to applicable joint or multinational doctrine concerning the range of military operations and joint or multinational forces. Trainers and educators throughout the Army will also use this publication. Soldiers, Marines, and officers who perform recovery operations and battle damage assessment and repair for their service perform a vital role of keeping units and personnel safe while maintaining and providing the effective operational readiness rates required to accomplish the mission. Recovery personnel, as identified in this publication, includes every person that plays a role in recovery operations or battle damage assessment and repair. This includes professional recovery personnel, such as maintenance control officers, warrant technicians and maintenance teams. All personnel involved in recovery operations/battle damage assessment and repair need to understand the environment in which they operate. This manual provides information on recovery support to unit operations including operations within the Joint environment.