[Sherman Logan]

The Greek resistance influenced the course of the entire war by forcing Germany to postpone the invasion of the Soviet Union in order to assist Italy.

I believe a true and accurate statement. Germany was within a few miles of Moscow when the winter hit. If they had even another month it is likely Moscow would have fallen. Given the extreme centralization of Soviet government in Moscow, this would likely have knocked the USSR out of the war.

With the USSR out of the picture, liberating Europe would have been MUCH tougher for the remaining Allies. Quite likely impossible without using nukes. Which we would have eventually done.

[dfwgator]

Given the extreme centralization of Soviet government in Moscow, this would likely have knocked the USSR out of the war.

I don't buy that, Stalin stayed in Moscow, but most of the command structure and industrial capacity had already been relocated past the Urals.