The year 1917 was unlike any other in American history, or in the history of American music. The United States entered World War I, jazz burst onto the national scene, and the German musicians who dominated classical music were forced from the stage. As the year progressed, New Orleans natives Nick LaRocca and Freddie Keppard popularized the new genre of jazz, a style that suited the frantic mood of the era. African-American bandleader James Reese...