The film holds the record (2002) for the largest number of craftsmen and technicians employed on a dramatic feature, with 532. The crew built enormous sets for war scenes, constructed buildings that were to be exploded, and built airplanes similar to those used in 1917.
Never shown in British cinemas.
Scott McGinnis turned down the supporting role of "Hollywood" in Top Gun in favor of the lead role in this film.
This movie was released internationally under the title "Gun-Bus", which was one of the Great War slang terms for one of the planes in the film.
British Bond and Carry On actress Margaret Nolan got out of the business and moved to Spain after this film. She didn't appear in another movie for 25 years and then had a role in The Power of Three (2011). It was her last role and then she passed away in 2020.