Other
St. Martin: Iron Curtain 1945 1947
This article discusses the development of the Soviet Union's Communist buffer zone after World War II and its evolution into the Iron Curtain of the Cold War.
Other
The Road Towards the Hitler Stalin Pact and Its Consequences
Essay describing the events surrounding the formation of the German-Soviet Nonaggression Pact in 1939. From a non-English site, but this particular page is English-only.