@Black_Elk just suggested what i think to be an excellent idea over at the triplea site. Have Normandy be “Original Owner True Neutral” or could make it “Pro_Allied”. Will start out controlled by France.
At any rate, when Team USA comes in and takes it and then Liberates Paris, it’ll still be USA controlled. Which is historical as well.
Gonna add it to the House Rules : )
Edit
So you’d need to use Gamerman1’s Normandy turns Pro-Allied if not Axis controlled after turn 1 as well. Can add a 2 PU objective for France if US of A controlls Normandy and Paris is free if you want.