[quote=@HaleyTheRandom]The more you know... now when I play it, I'll never be able not to notice these facts. xD[/quote]
One more for you...

...In the opening scenes of the game. If you allow the game to run through its introduction video uninterrupted you will notice German Mark V Panther tanks rolling into Paris for the first time. I assume this is when the Germans first invaded Paris in 1940. The only problem with that video is the Panther was designed in 1942 and began production to be issued to front line Panzer units in 1943.