The Royal Air Force (RAF) did not form a unit called "633 Squadron" during the Second World War. However, there was a 613 Squadron, equipped with Mosquitos, and credited with an attack on a Dutch Central Population Registry building on 11 April 1944, where the Germans held their Dutch Gestapo records. Furthermore, RAF Bomber Command undertook a variety of operations against German missile production facilities similar to that of the film - including Operations Crossbow, Bellicose, and Hydra.