Most histories of the Civil War focus on battles and top brass. Hardtack and Coffee is one of the few to give a vivid, detailed picture of what ordinary soldiers endured every day—in camp, on the march, at the edge of a booming, smoking hell. John D. Billings of Massachusetts enlisted in the Army of the Potomac and curvived the conditions he recorded. The authenticity of his book is heightened by the many drawings that a comrade, Charles W. Reed, made in the field.