. . . James McIvor has found an instance in the Civil War when the animosity between the Union and Confederate soldiers also lifted, if only for the length of a single song . . . As the opposing forces settled into battle lines near Murfreesboro, Tennessee, on December 30, 1862, the bands on each side played an evening concert for their respective comrades. The two concerts continued, unharmoniously enough, until, “as if by common consent,” recalled the Tennesseean, both took up “Home, Sweet Home.” The men on both sides soon joined together in singing the song. When it was...