This book provides a detailed account of the military history of the Third Division of the Ninth Corps of the Army of the Potomac during the Civil War. It covers the division's role in key battles such as Antietam, Fredericksburg, and Cold Harbor. The author also includes biographical sketches of key officers and soldiers. This book will appeal to readers interested in military history and the Civil War. 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.