When soldiers in the Civil War called on their religious beliefs in order to cope with the horrors of battle, many looked to the regimental chaplain for guidance and understanding. Clergy were always present to address the spiritual needs of the common soldier and administer to the wounded and dying. But as Warren Armstrong shows, military chaplains provided more than comfort.

In a country profoundly shaped by religion, each side adapted its version of Christianity to support its political views. This book documents the role played by Union chaplains in making better soldiers and...