September 17, 1862, at Antietam Creek was the bloodiest day of the Civil War, as both armies made heavy use of field artillery, the "long arm." In Artillery Hell Curt Johnson and Richard C. Anderson, Jr., provide a detailed examination of the role of field artillery in the Battle of Antietam. Johnson sets the context with an overview of organizational problems on the eve of a great battle. Anderson's concise discussion of different...