I think this is a great idea.
I think it should only apply to the Allies if the Axis declare war on them first, while it should apply to Germany either once Berlin is attacked, or if Great Southern Germany, Western Germany, Poland, and Slovakia Hungary are attacked. It should only apply to Japan if the home islands are attacked or if they control no other territories.
@The-Captain had this idea in one of his house rules, where these homeland milita were special units who could not leave the territory where they were raised.





