Book excerpt: This manual, Army Techniques Publication ATP 4-02.85 Multi-Service Tactics, Techniques, and Procedures for Treatment of Chemical Warfare Agent Casualties and Conventional Military Chemical Injuries April 2019, provides tactics, techniques, and procedures and is designed for use as a reference for trained members of the Armed Forces Medical Services and other medically qualified personnel on the recognition and treatment of chemical warfare (CW) agent casualties and conventional military chemical injuries. Additionally, this publication provides information on first aid (self-aid and buddy aid) and enhanced first aid (combat lifesaver [United States (U.S.) Army and U.S. Marine Corps]) for these casualties.This publication classifies and describes CW agents and other hazardous chemicals associated with military operations, and describes how to diagnose and treat conventional military chemical injuries (for example, riot control agents, obscurants, incendiary agents, and other toxic industrial chemicals [TICs]). Further, thispublication-Describes procedures for recognizing chemical agent casualties (Appendix A). Describes measures for handling contaminated clothing and equipment at medical treatment facilities (MTFs) (Appendix B). Describes medical management and treatment in chemical environment operations (Appendix C). Describes procedures for individual skin protection and decontamination (Appendix D). Describes procedures for administering nerve agent antidotes (Appendix E). Provides an immediate/emergency treatment ready reference for the treatment of CW agents and some TICs (Appendix F). Provides information regarding the Department of Defense (DOD) four-tier system for determining the levels of identification of CW agents (Appendix G). Provides information regarding protection and treatment of military working dogs (MWDs) (Appendix H). Metric measurements used throughout this publication are approximate equivalents of the customary units of measure. They are provided for the convenience of the users of this publication. The principal audience for this publication is the members of the Armed Forces Medical Services and other medically qualified personnel. This publication uses joint terms where applicable. Selected joint and Army terms and definitions appear in both the glossary and the text. Terms for which this publication is the proponent publication (the authority) are italicized in the text and are marked with an asterisk (*) in the glossary. Terms and definitions for which this publication is the proponent publication are boldfaced in the text. For other definitions shown in the text, the term is italicized and the number of the proponent publication follows the definition.