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When did East and West Germany reunify?
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East and West Germany officially reunified on October 3, 1990.123
Following the opening of the Berlin Wall on November 9, 1989, and the subsequent collapse of the communist regime in East Germany, negotiations for unification accelerated. The process was finalized through a unification treaty ratified by the Bundestag and the East German People’s Chamber, as well as the "two plus four" talks involving the two German states and the four major World War II Allies. Upon reunification, the German Democratic Republic joined the Federal Republic of Germany as five additional Länder, and the two parts of Berlin were merged into a single Land.14523