Hardline members of Gorbachev's communist party are unhappy with his liberalising and decentralising reforms.
Two weeks into Gorbachev's family holiday at his villa in Crimea the phone lines are disconnected and he is placed under house arrest.
Senior Party, Army and KGB officials demand that he resigns.
August 19-20: Counter-Coup
Tank divisions are moved into Moscow while coup supporters take over government buildings and television stations around the Soviet Union.
But before they gain control of the Russian parliamentary building (The White House) Yeltsin (Russia's president) and his supporters take it over, set up barricades and call on others against the coup to help defend the The White House.
Fearing a return to mass repression, underlings start to defy the coup leaders.
August 21: Coup Over - Long Live The Coup
The counter-coup does not restore the previous level of power to Gorbachev and the Soviet Union.
Instead, Yeltsin assumes control of the Russian economy and the Soviet security apparatus on Russian territory.
This fatally undermines the authority of the Soviet Union.
August 23: Russia Bans Communists
Yeltsin bans the Communist Party from Russia due to its support for the coup.
August 24:
Gorbachev resigns as the General Secretary of the Communist Party and urges the party's Central Committee to dissolve itself.
Ukraine declares independence ( = re-independence)
August 29: The Party's Over: Soviet Union Bans Communists
The Supreme Soviet of the Soviet Union
suspended all 'Communist Party of the Soviet Union' activity on Soviet territory
and instructs the prosecutor's office to investigate its leadership's role in the coup.
December 8: Belovezh Accords
With the Soviet Union dissolved, the leaders of
Russia, Ukraine and Belarus sign agreement setting up a Commonwealth of Independent States.
December 21: Alma-Ata Protocol
Another eight former Soviet republics join the Commonwealth of Independent States
December 25:
In a
televised address Gorbachev ends his activities as the Soviet Union's president.
December 26: Officially No USSR
The upper chamber of the Supreme Soviet of the Soviet Union
voted to adopt the declaration that: 'the creation of the Commonwealth of Independent States
had, in effect, ended the existence of the the USSR'.