This multiservice publication represents a significant revision to the August 2000 publication by expanding the scope from theater-based tactical sites to installations found in both foreign and domestic locations. It is designed for military commanders and personnel responsible for chemical, biological, radiological and nuclear (CBRN) defense planning at installations in the continental United States (CONUS) and outside the continental United States (OCONUS). The term "installation" will be used henceforth when referring to fixed sites, ports, and airfields in this manual. These personnel may be responsible for deliberate or crisis planning and may be required to execute plans across the conflict spectrum. This publication provides doctrine and tactics, techniques, and procedures (TTP) for planning, resourcing, and executing CBRN defense for various military installations as part of an overarching installation protection program. The chapters present a doctrinal foundation, and specific TTP are included in the appendixes. This manual incorporates the joint doctrine elements for combating weapons of mass destruction (WMD), to include counter-proliferation passive defense functions of CBRN sense, shape, shield, and sustain. It also ties installation CBRN defense to consequence management doctrine. During military operations, this publication is subordinate to current joint publications (JPs) addressing this topic.