In 1939, Francis joined the Army, where he would spend the next seven years. Eventually, he was assigned as cameraman and director to the Army Kinematograph Service at Wembley Studios, where he worked on many training films. About this, Francis said, "Most of the time I was with various film units within the service, so I got quite a bit of experience in all sorts of jobs, including being a cameraman and editing and generally being a jack of all trades."