Yugoslavia was not in the USSR. Nor was it in the Warsaw Pact even, I think.
I still think we should have massive countries. Full beyond Imperial size Germany (Grossdeutschland, or the idea of all Germanies together as one Germany, including AUstria) is a must. It would have happened anyways, regardless of Hitler or not.
Large Greece and large Balkans would be coo.
http://en.wikipedia....c_of_Yugoslavia
Enough of a reason for Yugoslavia siding with soviets.