The movie was pulled from release in Britain after just one week. It was banned there after heated protest from British veterans groups and the military establishment. As the Burma campaign was a predominantly British and Australian operation, the picture was taken as a national insult due to the movie's Americanization of the Burma operation. The resentment that many felt was seen as yet another example of Americans believing they had won the war singlehandedly. It was not shown in Britain again until 1952/1953 and then with an apology disclaimer. Incidentally, writer Lester Cole, who co-wrote the somewhat overly patriotic flag-waving script, would be branded an "Un-American" Communist, becoming one of the Hollywood Ten just a few years later.
All the weapons, uniforms, and gear used in this movie are original and accurate. This was possible due to the fact that these were still in use to the US military when this film was made. WW2 movies made in recent times use reproduction weapons and gear.
The story was partially inspired by "Operation Loincloth," a 1943 long-range operation in Burma by the British Chindits. However, producer Jerry Wald also admitted that much of the screenplay was based on 'Northwest Passage' (Book I -- Rogers' Rangers) (1940), a film about the adventures of a long-range ranger unit during the French & Indian War.
Most of the exteriors of Burma were shot at the Los Angeles County Arboretum and Botanic Garden. The film has an authentic feel to it, thanks to the use of authentic military aircraft and materials. Also, the film includes a large amount of authentic footage taken by U.S. Army Signal Corps cameramen in the China Burma India theater.