Sons o Guns (1936)

Broadway star Jimmy Canfield stars in a patriotic show on the great white way during WWI He plays the heroic soldier but he is doesnt want to join the Army To evade some troubles with fellow actress Berenice he acts like joining the forces going over there but that turns out to be real In France he falls in love with a French barmaid and is arrested as spy He escapes from prison only to end in the uniform of a German officer leading his soldiers in an Allied trap But being escaped from prison and wearing the enemys uniform isnt that healthy in wartime