Harry Morgan's film debut.
Maureen O'Haras' first film in Technicolor. She looked so good in it that she later earned the nickname "Queen of Technicolor".
In the finale John Payne is trying to change clothes while marching with his Marine Corps platoon. He later said that trying to remove and put on his trousers for this scene was the hardest part of the movie.
The exercise scene that takes place during Basic Training was filmed using actual Marines stationed at San Diego Recruit Depot as extras.
When Chris and Helene hear the incredible news of the Pearl Harbor bombing on the radio, Helene exclaims that "It's Orson Welles!" She's referring to the notorious "War of the Worlds" radio broadcast of October 1938, when Orson Welles and his Mercury Theater of the Air convinced at least thousands of Americans that Martians had landed in New Jersey.