Countries of Eastern Europe that Soviet Union seized after World War II?

estonia, lituania, latvia, belarus, romania, armenia... need any more?

The questioner uses the term "seized" which isn't exactly how it all took place as much of it was by the mutual agreement of the victorious parties, much like dividing the spoils of war. See Yalta and Potsdam agreements as the Powers carved up Western and Eastern Europe.

The disagreements gave rise to the Cold War which lasted for decades into the Reagan Administration.

A good resource which enumerates these is:

http://en.wikipedia.org/wiki/Soviet_bloc

This is an overly broad question as, for example, Germany was carved up into the British, American, French and Soviet sectors, to become known as East and West Germany. Yugoslavia bolted under Marshal Tito, Russia took over the Sakhalin Islands that were part of Japan, there were other disputes over who got what.

They invaded these countries
Estonia, Lituania, Latvia, Belarus, Romania, Armenia and Afghanistan. But they did not keep them. The only one seized after WWII was the division of Germany and they didn't keep that either.

Lithuania, Estonia, Hungary, Latvia, Romania, Bulgaria, Czechoslovakia, Poland, East Germany