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.
Steven Kreis, PhD
The History Guide: The Origins of the Cold War
A lengthy lecture-format page with key points of the development and emergence of the Cold War. Includes many useful links within the content.
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.