THE DEVELOPMENTS OF THE COLLAPSE OF THE WARSAW PACT
1988
After Gorbachev's visit to Poland, the Poland government initiated talks with Solidarity, a trade union which later became an opposition party.
Demonstrations and rallies in Czechoslovakia.
1989
Adoption of a multi-party system in the Hungarian Parliament.
First non- communist government in Poland after the election.
Demonstrations and riots in Rumania, Bulgaria and East Germany
Pulling down of the Berlin wall
1990
Non-communist governments established in Czechoslovakia and Hungary
East and West Germany were reunified