@Marshmallow:
It would be even more effective if the US could spend its money to build bases on Allied territory, regardless of whether or not the US owned the territory.
For that matter, the US should also be able to produce units at the factories in France (as a whole) on its turn even after France (the territory) has been liberated. Historically, the US provided everything for the French army after the liberation of Paris – the French could not supply their own army at all after Paris was liberated.
Marsh