A glee club in the United States is a musical group or choir group, historically of male voices but also of female or mixed voices, which traditionally specializes in the singing of short songs by trios or quartets. In the late 19th century it was very popular in most schools and was made a tradition to have in American high schools from then on.

The "Battle Cry of Freedom", also known as "Rally 'Round the Flag", is a song written in 1862 by American composer George Frederick Root (1820–1895) during the American Civil War. A patriotic song advocating the causes of Unionism and abolitionism, it became so popular that composer H. L. Schreiner and lyricist W. H. Barnes adapted it for the Confederacy.