Army Techniques Publication ATP 3-90.40 Combined Arms Countering Weapons of Mass Destruction JUNE 2017 ATP 3-90.40 provides doctrine on how to conduct the countering weapons of mass destruction (CWMD) mission as combined arms teams. It is primarily oriented on the brigade combat team (BCT) and below. This manual provides tactical-level commanders, staff, and key agencies with a primary reference for planning, synchronizing, integrating, and executing combined arms CWMD. At a minimum, it- Integrates current guidance, lessons learned, and new concepts that have been recently developed and fielded on this subject. Introduces the challenges associated with chemical, biological, radiological, and nuclear (CBRN) sites, to include sensitive (weapons of mass destruction [WMD] and select CBRN) and hazardous (toxic industrial material [TIM]) sites. Serves as the integrating doctrinal reference for supporting Army publications and their application in support of tactical-level CWMD in operational environments (OEs). Acts as a bridge for tactical CWMD operations between joint doctrine (primarily JP 3-40) and tactical doctrine (ADP 3-0, ATP 3-91, FM 3-90-1, and FM 3-96). Addresses the unique considerations of tactical CWMD. Briefly summarizes existing joint and tactical guidance to assist commanders and staff in applying CWMD fundamentals at the tactical level.