The majority of Warsaw Pact countries are in Eastern and Central Europe. These eight countries were: Albania, the Soviet Union (which contained many different countries), Romania, Poland, Hungary, East Germany, Czechoslovakia and Bulgaria. It is important to note that the Soviet Union does not exist any more and compromises of many different countries, East Germany does not exist as well as Germany is now reunified and Czechoslovakia is now two separate countries: the Czech Republic and Slovakia. The Warsaw Pact was a treaty that was collective among eight Eastern and Central European countries that were communist during the Cold War.
