The last major battle of the Civil War at Fort Blakely, Alabama, on April 9, 1865, was quickly overshadowed by the concurrent surrender of Robert E. Lee's army at Appomattox, and is largely forgotten today. And yet the Federal campaign against Mobile, the last important Southern city that remained in Rebel hands, was a significant military operation involving 45,000 Union soldiers and 9,000 Confederates. Faced with overwhelming odds, diehard Rebels...