Relying on his own World War I service, Wellman wrote the original story, based on the actual exploits of a friend from the war years. Earning himself the nickname "Wild Bill", Wellman was first an ambulance driver in the
Norton-Harjes Ambulance Corps, then joined the
French Foreign Legion. On December 3, 1917, assigned as the first American fighter pilot to join N.87
escadrille in the
Lafayette Flying Corps, Wellman went on to score three recorded "kills", along with five probables and to receive the
Croix de Guerre with two palms. Although he considered
Lafayette Escadrille a "personal project", the studio did not give Wellman the budget he demanded and continued to interfere with the project, to the extent that the decisions on starring roles, title, ending and other important aspects of the production were taken out of his hands, including the title of the film: Wellman's original title was ''C'est la Guerre
which the studio, despite his objections, changed to Lafayette Escadrille
. In casting, Wellman wanted Paul Newman and Clint Eastwood as the leads; studio head Jack L. Warner refused, and substituted teen idol Tab Hunter and David Janssen, with Eastwood moved to a minor role. Warner also insisted Wellman make Darby's Rangers as a condition of financing Lafayette Escadrille''. The use of mocked-up
Nieuport 28 and
Thomas-Morse Scout fighters along with other period aircraft such as one real
Fokker D.VII and the ubiquitous Travelair "Wichita Fokkers" were "lifted" from Wellman's earlier 1938 production,
Men with Wings, an early color feature also directed by Wellman. Principal photography took place primarily at the Hancock
Santa Maria, California airport. Hollywood stunt pilot
Paul Mantz, built a number of
Blériot XI "Penguin" clipped-wing and full span training aircraft, used in the training sequences. According to information in the Warner Bros. Archive, the original script—with the tragic ending in which Walker dies in combat and Renée commits suicide—was written by Paul Fix. A later script, dated October 1956 and attributed to A. Fleischman (with story credit to Wellman) has the happy ending. Shooting took place October 19 to December 8, 1956. ==Reception==