When Vicksburg fell to Union forces under General Grant in July 1863, the balance turned against the Confederacy in the trans-Appalachian theater. The Federal success along the river opened the way for advances into central and eastern Tennessee, which culminated in the bloody battle of Chickamauga and then a struggle for Chattanooga. Chickamauga is usually counted as a Confederate victory, albeit a costly one. That battle--indeed the entire campaign--is...