In 1942, following Lombard's death, Gable joined the U.S. Army Air Forces. Lombard had suggested that Gable enlist as part of the war effort, but MGM was reluctant to let him go, and he resisted the suggestion. Gable made a public statement after Lombard�??s death that prompted the Commanding General of the U.S. Army Air Forces Henry H. �??Hap�?? Arnold to offer Gable a �??special assignment�?? in aerial gunnery. Gable had earlier expressed an interest in officer candidate school, but he enlisted on August 12, 1942, with the intention of becoming an enlisted aerial gunner on a bomber. MGM arranged for his studio friend, the cinematographer Andrew McIntyre, to enlist with him and accompany him through training.However, shortly after his enlistment, McIntyre and he were sent to Miami Beach, Florida, where they entered USAAF OCS Class 42-E on August 17, 1942. Both completed training on October 28, 1942, commissioned as second lieutenants. His class of about 2,600 fellow students (of which he ranked about 700th in class standing) selected Gable as its graduation speaker, at which General Arnold presented the cadets with their commissions. Arnold then informed Gable of his special assignment: to make a recruiting film in combat with the Eighth Air Force to recruit aerial gunners. Gable and McIntyre were immediately sent to Flexible Gunnery School at Tyndall Field, Florida, followed by a photography course at Fort George Wright, Washington State and promoted to first lieutenants upon its completion.In May 1944, Gable was promoted to major. He hoped for another combat assignment, but when the invasion of Normandy came and went in June without any further orders, Gable was relieved from active duty as a major on June 12, 1944, at his request, since he was over-age for combat. His discharge papers were signed by Captain (later U.S. President) Ronald Reagan. Adolf Hitler favored Gable above all other actors. During World War II, Hitler offered a sizable reward to anyone who could capture and bring Gable to him unscathed.
http://www.thevintagenews.com/2016/05/05/top-10-hollywood-stars-served-wwii/2/