Trivia: If you look closely, there are many "Mickeys" in the scenery. For example, look in the bushes in various scenes and you will see three circles that form Mickey's head.
Trivia: Operation Petticoat was filmed at the US Naval Base in Key West Fla. They actually did paint a submarine pink. I was attending the Fleet Sonar School on the base at the time and watched with great interest. The submarine used was the U.S.S. Balao (SS-285), which was still in commission at the time.
Trivia: The dimitrodon, the dinosaur in the middle of the movie, is actually a real lizard (a basilisk, in fact) with a sail glued onto its back.
Trivia: This movie is based (loosely of course) on an actual Civil War raid led by Colonel Benjamin Grierson. See: "Grierson's Raid: A Cavalry Adventure of the Civil War" by Dee Brown.
Trivia: In the cartoon's opening title credits, there is no "Layout" next to Robert Gribbroek's name, which makes him appear to be an animator.