When Lachie asks Yank what he's going to do after the war, Yank replies that he's going back to "...a little place on the Rock River, Dixon, Illinois." This is actor Ronald Reagan's actual boyhood home.
Director, Vincent Sherman had settled on using Gordon Jackson for the role of Lachie, when he spotted Richard Todd in the studio bar and recast the role, which earned Todd an Oscar nomination. Jackson played the part in a later television adaptation.
The movie, which takes place in tropical Burma, had to be shot in London to take advantage of frozen funds that had accumulated during the War. It turned out to be one of the coldest London winters ever.
The first successful use of a hemodialysis machine was in 1945 - the year of this film. The first successful kidney transplant occurred in 1954. Peritoneal dialysis was not in widespread use until the 1960's.