I am not going too deep into the re-unification of Germany. I will leave the images do the talking.
German reunification (Deutsche Wiedervereinigung) took place on October 3, 1990, when the areas of the former German Democratic Republic (GDR, in English commonly called “East Germany”) were incorporated into the Federal Republic of Germany (FRG, in English commonly called “West Germany”), both formed in 1949, after World War II.
Below are some images of that day and some events leading up to it
Berlin Wall at the Brandenburg Gate, 10 November 1989. Note the graffito Wie denn (“What now”) over the sign warning the public that they are leaving West Berlin.
Police officers of the East German Volkspolizei wait for the official opening of the Brandenburg Gate on 22 December 1989.
Berlin Wall, October 1990, Saying “Thank You, Gorbi”
Many Trabants were abandoned after 1989 (this one photographed in Leipzig, 1990)
East German Prime Minister Hans Modrow, West German Chancellor Helmut Kohl, and mayor of West Berlin Walter Momper among other figures take part in the official opening of the Brandenburg Gate on 22 December 1989.