- This was Michael Caine's first major film role. He watched the rushes, but was so nervous that he was sick, and never watched rushes again.
- Caine visited the officers' mess of the Scots Guards at Pirbright to perfect his accent.
- Welsh-born Stanley Baker was determined to make this film. Unable to find finance, he sunk most of his own money into the project.
- Because the Zulus who were playing the extras in the film had never seen a movie, Stanley Baker held an outdoor screening of a 'Autry, Gene' movie for them so they would have an idea of what movies were all about.
- The opening and closing narration is read by Richard Burton.
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