Many believed that Gorbachev had weakened Communism. On 19th Aug 1991, Communist officials ‘The Gang of 8’ organised a coup to remove Gorbachev from power and replace him with Yeltsin. This only lasted 3 days but Gorbachev lost popularity.
On 21st Aug 1991, Gorbachev returned to Moscow to resume his position as leader and introduced even more independence.
Estonia, Latvia, Lithuania and Moscow declared themselves as independent and Gorbachev began to realise he was unpopular in the West.
Therefore, on the 25th December 1991, Gorbachev announced the dissolution of the Soviet Union and resigned. The Soviet Union split into separate states.
The rivalry between Communist East and Capitalist West was now over.
The Warsaw Pact also weakened further and officially ended in July 1991.