SpookyFrank
Don't swallow the cap
The film is based on several events that really did happen in Holland during WWII. It didn't say it was based on a true story anywhere in the film. It's fairly obvious that the film is made in a style of classic Hollywood war time adventures and that it isn't supposed to be a naturalistic docu-drama.
There's even a reference to Greta Garbo in the film to give you a hint that this is the case
