WORLD HISTORY

Detailed explanation-1: -The Warsaw Pact was a collective defence treaty established by the Soviet Union and seven other Soviet satellite states in Central and Eastern Europe: Albania, Bulgaria, Czechoslovakia, East Germany, Hungary, Poland and Romania (Albania withdrew in 1968).

Detailed explanation-2: -The Warsaw Pact was created in reaction to the integration of West Germany into NATO in 1955 and represented a Soviet counterweight to NATO, composed of the Soviet Union and seven other Soviet satellite states in Central and Eastern Europe.

Detailed explanation-3: -In 1949, the prospect of further Communist expansion prompted the United States and 11 other Western nations to form the North Atlantic Treaty Organization (NATO). The Soviet Union and its affiliated Communist nations in Eastern Europe founded a rival alliance, the Warsaw Pact, in 1955.

Detailed explanation-4: -The establishment of NATO also spurred the Soviet Union to create an alliance with the communist governments of Eastern Europe that was formalized in 1955 by the Warsaw Pact.