Deliberate mistake: The German tanks in this movie are not really Tiger tanks. They are Russian T-34's made to look like Tigers. The T-34's are done up very realistically, including Zimmerit (the wavy pattern on the hull of the tiger), which was an anti-magnetic paste put on the tank.
Kelly's Heroes (1970)
1 deliberate mistake - chronological order
Directed by: Brian G. Hutton
Starring: Clint Eastwood, Donald Sutherland, Harry Dean Stanton, Telly Savalas, Carroll O'Connor, Don Rickles
Factual error: Oddball tells Kelly their commander had been trying to get them killed ever since they landed at Omaha (beach). Oddball's tanks are part of the U.S. sixth Armored division (the Super Sixth, as the unit shoulder patch on his jacket indicates) which actually landed at Utah beach on July 18, 1944. (00:30:50)
Oddball: Why don't you knock it off with them negative waves? Why don't you dig how beautiful it is out here? Why don't you say something righteous and hopeful for a change?
Moriarty: Crap.
More trivia for Kelly's Heroes
Question: What type of Allied fighter destroyed the units vehicles? It doesn't look like any allied combat aircraft I've seen before.
Chosen answer: From the markings it looks like a P47 jug. Strange thing is it was equipped with rockets, which I have only seen outfitted on the P-38 lightning and the P-51 Mustang. Kelly's is a great movie but far from historically accurate. There is a country song Odd Ball Plays as the blow up the rail yard that not even close to having been released at the time.
Answer: It's a Yugoslav Soko 522 Ikarus.