I had an idea that the French units in any territory be neutral (after Paris fell)
In case you ask me, I totally agree with that part, man…
And this should not be a special rule to France only, it should be a common rule to any player that lose his capital.
When you capital is taken, all your unoccupied territories and colonies become true neutrals. Period.
UK and US wants to land in by now neutral Morocco ? Then they must combat move in and fight.
Rome get taken by US, with both by now neutral Italian and still at war German units in Northern Italy ? Now that makes Northern Italy a contestet area, and I figure that the Italian units there must roll defense dice against the present Germans, just like they rolled against the invading US troops a second before.
But for this to work we must skip the silly and historically not very correct OOB rule that trigger all true neutrals around the globe to declare war on you