Reunification
During the summer of 1989, rapid changes known as peaceful revolution or Die Wende took place in East Germany, which quickly led to German reunification. Growing numbers of East Germans emigrated to West Germany, many via Hungary after Hungary's reformist government opened its borders. Thousands of East Germans also tried to reach the West by staging sit-ins at West German diplomatic facilities in other East European capitals, most notably in Prague. The exodus generated demands within East Germany for political change, and mass demonstrations in several cities continued to grow.
Unable to stop the growing civil unrest, Erich Honecker was forced to resign in October, and on 9 November, East German authorities unexpectedly allowed East German citizens to enter West Berlin and West Germany. Hundreds of thousands of people took advantage of the opportunity; new crossing points were opened in the Berlin Wall and along the border with West Germany. This led to the acceleration of the process of reforms in East Germany that ended with the German reunification that came into force on 3 October 1990.
Read more about this topic: History Of Germany