This book is a comprehensive and authoritative history of the Chemical Warfare Service, a key military unit responsible for developing and deploying chemical weapons during World War I. Drawing on extensive archival research and interviews with veterans, the authors provide a detailed and unvarnished account of this controversial and often overlooked aspect of modern warfare. A must-read for military history enthusiasts, policymakers, and anyone interested in the ethics and consequences of warfare. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.