Often called Lee's greatest triumph, the battle of Chancellorsville decimated the Union Eleventh Corps, composed of large numbers of German-speaking volunteers. Poorly deployed, the unit was routed by "Stonewall" Jackson and became the scapegoat for the Northern defeat, blamed by many on the "flight" of German immigrant troops. The impact on America's large German community was devastating. But there is much more to the story than that. Drawing for the first time on German-language newspapers, soldiers' letters, memoirs, and regimental records, Christian Keller reconstructs the battle and its...