Prologue, shown printed in a book: No single story could ever pay full tribute to the accomplishments of the U.S. Army Intelligence in World War II. Working secretly behind enemy lines, in close cooperation with our Allies, its brilliant work was an acknowledged factor in the final victory. The page turns to reveal: In order to obtain the maximum of realism and authenticity, all the exterior and interior settings in this Motion Picture were photographed in the field - - and, whenever possible, at the actual locations.