Concept
Version 14
Created by Boundless
Origins of the Cold War
Border Changes in Eastern Europe from 1938 - 1948
Expansion of the USSR during WWII. The borders of Eastern bloc's members other than the USSR, Poland and Yugoslavia are shown in their post-war status.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"EasternBloc BorderChange38-48."
http://en.wikipedia.org/wiki/File:EasternBloc_BorderChange38-48.svg
Wikipedia
GNU FDL.