When an American M3 half-track is used in a movie by Axis forces because Axis vehicles, like the Hanomag, were not available during filming. Of course, Germans often used captured vehicles, but there’s an example in The Battle of Britain where the German troops are using them in 1940, a year before they were put into service.

Here’s one in Ice Cold in Alex

YouTube influencer Lindybeige has a video that touches on this subject, though it is primarily about the German half-track.