Former Soviet leader Mikhail Gorbachev may be remembered today as the man who presided over the collapse of an empire: The recent anniversary of the fall of the Berlin Wall in 1989 saw major celebrations to mark the collapse of Communism in eastern Europe and the reunification of Germany.

(SOURCE) https://www.cnn.com/2019/12/01/europe/gorbachev-russia-us-cold-war-intl/index.html