Trivia: The movie was not very popular in the US since it dealt with WWII and Nazis in a very unconventional way (for Americans), but it did enjoy great popularity in Europe.
Trivia: The assassination attempt on Hitler obviously originates from the historical attempt from July 20, 1944, by Oberst von Stauffenberg, as it should have been under "ideal" conditions - except that the bombing occurred in Hitler's command center the "Wolfsschanze," in East Prussia.
Trivia: The Lieutenant Levitch character is a reference to Jerry Lewis' actual family name, Levitch. Jerry Lewis' birth name was Joseph Levitch.
Trivia: Jerry Lewis' real son, Ron, plays Lieutenant Levitch in the film.