Paratroopers talk a big game…
But for examle, if Patton hadn’t have broken through to Bastogne, they would have been massacred :S
I still think it is a bit complicated.
Just have a rule that says you have a full round, from the time you are cut off, to establish a line of supply (unbroken, but you can make it as conveluted as you need to establish it) to a friendly industrial complex or all units in the territory are lost. It must be a major industrial complex or convoy zone (free of enemy warships.) That stops you from building a minor complex to supply your troops and stops the enemy from just taking a major complex and cutting off your entire continent since you can get to a convoy zone instead.
Maybe I think too simply? It just seems the easier it is to understand, the better the chances of using it and spreading the idea to others.
I prefer the notion of keeping it simple. My A&A “house rules” games have so many rules as it is…