 One of producer Darryl F. Zanuck (qv)s big worries was that, as  filming of the actual invasion drew near, he couldnt find any  working German Messerschmitts, which strafed the beach, or British  Spitfires, which chased them away. He finally found two  Messerschmitts that were being used by the Spanish Air Force, and  two Spitfires that were still on active duty with the Belgian Air  Force, and rented all four of them for the invasion scenes.