Royal Air Force Squadron Leader Charles Wyatt (James Stephenson) asks his friend, Jimmy Grant (Ronald Reagan), a daredevil pilot on the airshow circuit, to join the RAF's International Squadron, made up of Americans. Jimmy turns him down, saying that he intends to stay safe at home. Faced with a breach-of-promise suit, Jimmy, however, is hired to deliver a new American-designed Lockheed Hudson bomber to the RAF, flying to England with his mechanic, "Omaha" McGrath (Cliff Edwards). When they encounter a heavy fog over the English base, Jimmy ignores a request from Charles to bail out, and brings the bomber in to a safe landing.
While in London, Jimmy meets up with an old friend, Rog Wilkins (William Lundigan) now serving in the International Squadron. Jeanette (Olympe Bradna), the young French woman assigned as his driver, he asks her out for dinner. A German raid hits the city. Jimmy is impressed by the courage of the embattled Londoners and moved by the death of a young child, to join the fight.
In the RAF, Jimmy is not able to fit in, and during an air patrol, while he shots down a German bomber, his reckless flying results in the death of an RAF comrade. The only thing that saves him from dismissal is the intervention of Charles. The next occasion when Jimmy can make amends ends badly as he wants to take Jeanette out, appealing to Rog to stand in for him. Despite being on call for 20 hours, Rog flies his patrol, and is shot down and killed.
In despair, Jimmy wants to quit but Charles persuades him to stay and avenge his friend's death. When Jeanette's boyfriend, Michele Edmé (Tod Andrews) is selected for a dangerous bombing mission over Nazi-held territory, Jimmy knocks him out and takes his place. Caught by enemy aircraft, Jimmy shoots two down, successfully completing his bombing run but is overwhelmed and shot down, crashing to his death. At his airbase, the International Squadron drinks a toast in tribute to him.
When American pilots went to war in the R.A.F. Eagle Squadrons, it set off a minor war between several of the Hollywood studios. Producer Walter Wanger had immediately copyrighted the name of "Eagle Squadron" for his film of the same name that appeared in early 1942. Producer Darryl F. Zanuck of 20th Century Fox wrote angry letters to Hal Wallis of Warner Bros. accusing them of not only stealing his idea of his A Yank in the R.A.F. but making a low budget B picture to beat Fox's prestigious production to the screen.
Zanuck threatened legal action unless Warners stopped the film from being made or not to release their film until 60 days after Zanuck's film was released. Warners ignored Zanuck as the Eagle Squadrons were a major news item of the day and Warners based their screenplay on a film made by the studio Ceiling Zero based on a play by Frank Wead. They did change the film's original title from Eagle Squadron to Flight Patrol then finally International Squadron and released it two months before A Yank in the R.A.F.[2]
Warners acquired another boost by hiring Byron Kennerly, a former member of an Eagle Squadron as the film's technical advisor. Kennerly had written a magazine story Squadron 71, Scramble! A Day in the Eagle Squadron, R.A.F. that was published in the July 1941 issue of Harper's Magazine and was in the process of writing a book The Eagles Roar! that Warners bought the rights to. However, according to some sources Kennerly left the Eagle Squadron before their first engagement;[3] with some sources saying he was on furlough for an ear ailment.[4] Kennerly later served with the United States Army Air Forces and was jailed for bank robbery in February 1951.[5]
Actual film of dogfighting between Spitfires and Messerschmitts and Heinkels and a London air raid were shot by Warners' Teddington studios technicians and shipped to the United States for inclusion in the film.[6]
International Squadron was favorably reviewed by Theodore Strauss for The New York Times, who said: "As another aerial and romantic dog-fight in the hurtling succession of epics about the Royal Air Force, it breezes along with dash and bravado and not too much self-importance. Its emotional upheavals are tossed off with a wisecrack; it doesn't belabor its story with inspirational organ music, and it keeps its wheels well off the ground. No ace among war films, it is none the less a brisk, brash flier in pulse-quickening entertainment."[8]
Glancy, H. Mark. When Hollywood Loved Britain: The Hollywood 'British' Film 1939-1945. Manchester University Press, 1999.
Klinkowitz, Jerome. Yanks Over Europe: American Flyers in World War II. Lexington, Kentucky: University Press of Kentucky, 1996. ISBN978-0-8131-5610-1.
Orriss, Bruce. When Hollywood Ruled the Skies: The Aviation Film Classics of World War II. Hawthorne, California: Aero Associates Inc., 1984. ISBN0-9613088-0-X.
Pendo, Stephen. Aviation in the Cinema. Lanham, Maryland: Scarecrow Press, 1985. ISBN0-8-1081-746-2.