"When LL comes to an abrupt end (as it would in a ww3 scenario with the Western Allies)" It would have been a problem for USSR, however I think, as said in a previous debate, that the Allies would have face: a famine (harvesting in Europe was a disaster in 1945) and of course the Communist Parties (powerful and armed) mainly in France and Italy (and Greece, Yugoslavia etc). I am not sure that the "Allies" logistic would have been so good, and then, their Generals definitevely not at the same levels than the Soviets.