Correct original ‘Red Dawn’
London headquarters of the French underground broadcast many such messages before the invasion of Normandy; one such, ‘John a un longue moustache’ or ‘John has a long mustache’ is utilized as an illustration in the film ‘The Longest Day’ - which considerably predates the film ‘Red Dawn.’
Evidently, its use in the latter film is an homage to the Zanuck production.