A tune to comradery, and a favorite among World War I soldiers, was written by husband and wife Theodore and Theodora Morse (D.A. Esrom, Morse spelled backwards)
American Vaudeville Museum Collection (MS 421), MS 365 Box 2 Folder 2, azu_ms365_b2_f2_hail_hail_1917_w.pdf, courtesy of University of Arizona Libraries, Special Collections.
