The Warsaw Pact or Warsaw Pact, officially called the Agreement on Friendship, Cooperation and Mutual Assistance (Russian: Agreement on Friendship, Cooperation and Mutual Assistance), was a military organization of Central and Eastern European socialist countries. It was established on May 14, 1955, to repel a possible NATO attack (which was created in April 1949). The creation of the Warsaw Pact was caused by the inclusion of the newly armed West Germany in NATO with the adoption of the Paris Agreement. The pact existed during the Cold War, until, after the collapse of communist countries in Europe and political changes in the Union of Soviet Socialist Republics, members began to withdraw in 1991. The Warsaw Pact was officially dissolved in July 1991.
Union of Soviet Socialist Republics
People's Republic of Albania (withdrew its support in 1961 due to ideological differences, officially left in 1968)
People's Republic of Bulgaria
Czechoslovak Socialist Republic
German Democratic Republic (joined in 1956; left in October 1990)
People's Republic of Hungary
People's Republic of Poland
Socialist Republic of RomaniaAll communist countries in Central and Eastern Europe were signatories except Yugoslavia. Members of the Warsaw Pact have pledged to defend each other if one or more members are attacked. The treaty also argued that relations between the signatories were based on mutual non-interference in internal affairs and respect for national sovereignty and independence. The rule of non-interference was later violated by interventions in Hungary (Hungarian Revolution 1956) and Czechoslovakia (Prague Spring, 1968). However, in both cases, the intervention forces claimed that they had been summoned and that this rule had not been officially considered violated.
The People's Republic of Albania stopped supporting the alliance in 1961 as a result of the Sino-Soviet split in which the stubborn Stalinist regime in Albania united with China, and officially withdrew from the 1968 pact.
In East Berlin, on September 24, East Germany signed an agreement with the Soviet Union that would end East Germany's membership on October 3, 1990 (ie, the day of German unification).
During the Hungarian Revolution of 1956, the government took the lead