The purpose of this battlebook is to address operational health concerns in environments where Nuclear, Biological, and Chemical (NBC) threats exist. Potential NBC threats range from weapons of mass destruction to contamination of the battlefield by hazardous material. Medical personnel, in conjunction with chemical personnel, must be able to advise commanders on a wide range of issues including the health effects of NBC threats, protective clothing and measures, and management of NBC casualties. This manual is not an emergency response book or treatment guide. It is intended to provide a quick reference for decision making as to whether to request expert consultation in a given area. Except in extreme emergency, the contents should not be construed as definitive.