A few weeks after the bloody battle of Chancellorsville in May 1863, an odd event took place at the front lines of the Civil War armies camped on the Rappahannock River in Virginia. The two sides — camped approximately a mile from one another — engaged in a battle of the bands.
According to University of Virginia Professor Dr. Gary W. Gallagher in his Great Courses lecture series on the war, the concert was begun by a Union band on one side of the field who played a patriotic northern song, likely "Yankee Doodle" or "Battle Hymn of the Republic." Just after they finished playing, the Confederate band opened with the song "Dixie."
The two bands then continued playing songs for one another throughout the early hours of the night, until the Union band started playing "Home on the Range," a song popular in both Union and Confederate camps throughout the war.
The Confederate band joined in during the song, and soldiers from each side sang along.
The entire event was captured in a poem "Music in Camp" by John Reuben Thomas.
Like the later Christmas Truce of World War I, the peace between the warring sides was short-lived. The Civil War would rage for almost two more years before its official end in May 1865. Indeed, the bloodiest battle of the war, Gettysburg, would take place just a few short weeks after the impromptu concert.