A Fresh Analysis of the First Large-Scale Imprisonment of Soldiers in Wartime and Its Failures  Over the course of the American Civil War, more than four hundred thousand prisoners were taken by the North and South combined--the largest number in any conflict up to that time, and nearly fifty-eight thousand of these men died while incarcerated or soon after being released. Neither side expected to take so many prisoners in the wake of battles and neither had any experience on how to deal with such large numbers. Prison camps were quickly established, and as the war progressed, reports of sickness, starvation, mistreatment by guards, and other horrors circulated in the press. After the war, recriminations were leveled on both sides, and much of the immediate ill-will between the North and South dealt with prisoners and their treatment.      In Military Prisons of the Civil War: A Comparative Analysis historic preservationist David L. Keller consulted official records, newspaper reports, first-person accounts from prisoners, and other primary source material in order to understand why imprisonment during the Civil War failed on both sides. His research identifies five factors shared among both Union and Confederate prisons that led to so many deaths, including the lack of a strategic plan on either side for handling prisoners, inadequate plans for holding prisoners for long periods of time, and poor selection and training of camp command and guards.