Ten minutes into the film Young engages in a dogfight with a German pilot. Some of the footage for this scene was taken from the climax of 1930's THE DAWN PATROL.

Multiple times the Allied pilots refer to the Germans as "Greentails." This is a reference to the German squadron Jasta 5, nicknamed "Greentails" because all of their planes had a distinctive green paint scheme on the tail. Jasta 5 was one of the most prolific and deadly German squadrons of the war, recording 253 victories while losing only 19 pilots killed in action.

A German ace pilot is identified as "Arnold Voss." There is no documented German pilot with that name from WWI, however, there WAS a pilot named "Werner Voss." He was one of Germany's best pilots in the war, amassing 48 victories before falling in solo combat against eight English aces on 23 September 1917. He was only 20 years old at the time of his death.

One of over 700 Paramount productions, filmed between 1929 and 1949, which were sold to MCA/Universal in 1958 for television distribution, and have been owned and controlled by Universal ever since. Its earliest documented telecasts took place in Seattle Thursday 9 April 1959 on KIRO (Channel 7), and in Milwaukee Friday 10 April 1959 on WITI (Channel 6); in San Francisco it first aired 7 May 1959 on KPIX (Channel 5), in Philadelphia 20 July 1959 on WCAU (Channel 10), in Grand Rapids 9 September 1959 on WOOD (Channel 8), and in Toledo 21 December 1959 on WTOL (Channel 11). It was released on DVD 17 May 2012 by Turner Classic Movies as part of the Cary Grant: The Early Years Collection, on 4 June 2013 as part of Universal's War Collection, again as a single 27 September 2013 as part of the Universal MOD Collection, and again 19 April 2016 as one of 18 [Paramount] titles in Universal's Cary Grant: The Vault Collection; since that time, it has also enjoyed occasional airings on cable TV on Turner Classic Movies.

During filming, an explosion went off prematurely, causing Fredric March to become trapped under some fallen beams. Despite being injured himself, Cary Grant held up one of the beams to allow March to escape, saving him from more serious injury.

Gary Cooper was considered for the role of Henry Crocker, and George Raft for the role of Jerry Young.

Twelve members of the Associated Motion Picture Pilots, also known as "The Suicide Squad" worked on this film. The group first worked together on Wings (1927).

In interviews contained in Hollywood Director by David Chierichetti, Leisen revealed that the ending of the movie had been changed, which in turn diluted the anti-war purpose of the movie. "The whole reason I wanted to do the script so much was for the end. When March commits suicide, Cary Grant gives him a Viking funeral by putting him in the plane and make it look like he's been shot down in action. March becomes a hero in spite of himself. In the end, you see a plaque in March's hometown; that's where the film ends now, but, originally, we pulled back from the plaque, until we see Cary Grant, walking by with a bottle in a paper bag. He has become a bum, and he will regret all his life the mockery he made of March's death."