James Cagney portrays "Capt. Flagg" heading up an American marine unit in France nearing the close of World War One, where he finds himself unexpectedly facing off against his longtime rival, "Sgt. Quirt," played by Dan Dailey. Despite their differing positions, they frequently find themselves on equal footing – often spurred by alcohol and a shared pursuit of the same woman. This particular lady is “Charmaine” (Cori…