How about when Paris is taken Normandy-Bordeaux, Southern France, the navy in Mediterranean and the french force in North Africa joined the Nazis, but half of the units in France is moved to UK represents Free French forces who fled and the rest of the French territories in Africa and around the world remains unde Free French control.
It would have to be considered an alternate-history scenario. The French Navy and the French colonial forces never joined the Nazis, and the number of French forces who crossed the Channel from France to England to form the Free French was nowhere near large enough to represent half of France’s military units.
On the other hand, it’s perfectly accurate to have some of France’s colonial territories go over to the Free French side soon after France is occupied becauset that’s what happened in reality.