The thread John Wayne Could He Act throws up some actors who really did serve, some of them are remarkable. Henry Fonda - US Navy. Bronze Star for Valour. Glenn Ford - US Navy. In addition to his WWII service, he served in the reserves during the Korean War and the Viet Nam War. He retired as a Captain in the US Naval Reserve. Clark Gable - Captain, US Army Air Corps. Gable returned to the U.S. in Oct. 1943 and was relieved from active duty as a major on Jun. 12, 1944 at his own request, since he was over age for combat. Lee Marvin USMC "James Mason was a conscientious objector" allegedly. "Noel Coward refused to cast James Mason in his wartime film 'In Which We Serve' because of this". Film made in part at Devonport, Plymouth. Coward's reasoning was that he felt it was not appropriate for a man who had refused to wear a military uniform in real life to wear one in a film.