In response to NATO, Eastern European nations including Poland & the USSR signed this 1955 treaty
When the Federal Republic of Germany entered NATO in early May 
1955, the ... was on the rise in Eastern European countries and determined that a 
unified, ... to the Warsaw Treaty Organization were the Soviet Union, Albania, 
Poland,... [DOC] [TLE] Warsaw Treaty Organization facts, information, pictures ... [PAR] The organization was used to suppress dissent in Eastern Europe through ...