Kirk Douglas
Kirk Douglas wasn't always the star we remember him as today. The actor spent a portion of his career in the US Navy as a gunnery and communications officer. He was medically discharged once he suffered an abdominal injury from a preemptive explosion. He left the service and moved to New York, finding some work in radio and television that led to his long term career.
George Carlin
George Carlin was always made to be a star, but his career really started in the sky! he joined the United States Air Force and trained to be a radar technician. At the Barksdale Air Force Base in Bossier City, Louisiana, Carlin also became a disc jockey and worked for the radio station. He was called unproductive by his superiors and was given a general discharge, as well as three court-martials.