Considered by many to be the architect of the modern U.S. Army, Union General Emory Upton commanded troops in almost every major battle of the Civil War's Eastern Theater. Witnessing some of the war's bloodiest engagements convinced him of the need for comprehensive reform in military organization, professionalism, education, tactics and personnel policies. From the end of the war to his 1881 death by suicide, Upton led an effort to modernize U.S. military culture. While much has been written about the politics of his reform campaign, this book details his wartime experiences and how they informed his intense fervor for change.