The RAF SE.5 fighter (quickly becoming the SE.5a) was one of the aircraft that turned the air war around for the Allies. Both fast and maneuverable, it was easy to fly and an excellent gun platform, as demonstrated by the many aces who scored most of their victories in the airplane. Though engine problems inhibited its early success, once they were solved, it became one of the best fighters of the entire War, able to match or beat anything the Germans flew. Over 5000 aircraft were produced.

James McCudden began the war as an observer and became the most highly decorated Allied airman, a precise and patient pilot that achieved 57 victories, most of which came flying in the glorious SE.5a.