I have herd of Warsaw Pact before, but never knew what it actually means. Now I know what Warsaw Pact is .The definiton of Warsaw Pact is a military treaty and association of European countries, formed in 1955 by the Soviet Union, Bulgaria, Czechoslovakia, East Germany, Hungary, Poland, and Romania: East Germany left in 1990; the remaining members dissolved the Pact in 1991. Now, what is the purpose of Warsaw Pact. Lots of people say that Warsaw Pact was just a reaction to NATO. Nobody actually now the real reason, but who knows that could be the reason.