When the camera pans Patton's troops, there is an intermingling of black and white faces. But the Army was strictly segregated in 1945.
Klaus Barbie is wearing the wrong rank during the entire film. He was a Hauptsturmführer not an Obersturmbannführer. Barbie was the equivalent to a Captain not a Lieutenant Colonel. Big historical difference.
Barbie murders a group of seven people standing side by side in an empty swimming pool facing him. But he only fires six shots.
When the group crossed the border from French to Switzerland it was Montriond France. Not Montriand .
George Patton was well-known for being an outspoken anti-Semite who would never have lauded Marcel Marceau and his efforts to save Jewish children.