True, in fact the only reason English managed to escape Dunkirk was due to the heavy resistance fighters of France and the English Commonwealth (Indians and others) that fought in the streets while it gave time for the English to escape.

Another huge story completely left out in movies like Dunkirk for example.

Now why leave out the valiant efforts of the French resistance and the Commonwealth soldiers? In fact the movie promoted the ships and vessels who came from England to save them, but not the men who died in the streets trying to slow down the Nazi advance to give the English time to flee.