Having learned to fly from pilots he befriended, Smith enlisted in the United States Army Air Forces in the hopes of becoming a military pilot. He was invalidated from the flight programme because of imperfect vision in his left eye. Given a choice between joining the military band and being sent to mechanic’s school, Smith opted to join the military band. Smith claimed that they gave him a cornet, an Arban’s instructional book, and two weeks to meet the standard, which included being able to read music. Determined not to go to mechanic’s school, Smith spent the two weeks practicing the cornet in the latrine, as recommended by the bandleader, and passed the examination.