James M. Cain and the songwriter Al Dubin were drafted into the army and served on the Western Front during World War I. Both men would go on to play major roles in the making of American popular culture during the interwar period: Cain writing the noir bestsellers The Postman Always Rings Twice and Double Indemnity, Dubin providing the lyrics for several hit musicals, including 42nd Street. For both artists, the impact of the war was more complicated than the themes of disillusionment and a collective loss of innocence more famously offered by writers like Hemingway and Dos Passos. This article argues that Cain's and Dubin's pop successes in fact reflected the attitudes of millions of other veterans, who rejected the Progressive Era's moralism and asserted a new, determined, cynical, and irreverent sensibility in American life. Cain and Dubin were not alone, but part of a larger generation of Great War veteran artists who are rarely regarded as such, Frank Capra, Preston Sturges, Jack Benny, Thomas Hart Benton, and Norman Rockwell among them. Working in the most accessible forms of art and entertainment, their contributions, no less than the Lost Generation's, should also be identified as an important legacy of World War I.