Mikhail Gorbachev resigned from his position as Prime Minister of the Soviet Union.
Mikhail Gorbachev is awarded the Nobel Peace Prize.
Mikhail Gorbachev was elected as the Soviet Union's first President.
Soviet President Mikhail Gorbachev and US President George H. W. Bush declared an end to the Cold War.
US President Ronald Reagan and Soviet leader Mikhail Gorbachev signed a treaty eliminating medium-range nuclear missiles.
Ronald Reagan challenges Mikhail Gorbachev to 'tear down this wall'.
