Made on the RKO lot in only 35 days for a minimal budget of $750,000.
After reading the script, the military flatly refused to allow any co-operation with the production. That meant no tanks, no uniforms, no troops. They didn't even allow director Robert Aldrich to view any Signal Corps footage. Aldrich managed to rent two tanks; by careful staging and ingenuity, he was able to convey the impression that many more were being used.
Congressman Melvin Price openly criticized the military for their non-involvement in the film, calling it a "shameful attempt at censorship". United Artists were only too happy to exploit this with teaser posters asking "Is this the most controversial picture of the year?" On the back of this, the film grossed nearly $2 million (United Artists had projected a gross of around $20,000).
Although he plays a coward in this film, in real life Eddie Albert, who served in WW II, was a war hero, in one engagement having braved heavy enemy fire to rescue 70 wounded Marines.