1961 The German Democratic Republic closes the border between the eastern and western sectors of Berlin to thwart its inhabitants' attempts to escape to the West.
1961 Conrad Schumann flees from East Germany while on duty guarding the construction of the Berlin Wall.
1962 East German border guards kill 18-year-old Peter Fechter as he attempts to cross the Berlin Wall into West Berlin becoming one of the first victims of the wall.
1987 Cold War: At the Brandenburg Gate U.S. President Ronald Reagan publicly challenges Mikhail Gorbachev to tear down the Berlin Wall.
1989 Cold War: Fall of the Berlin Wall. Communist-controlled East Germany opens checkpoints in the Berlin Wall allowing its citizens to travel to West Germany. This key event led to the eventual reunification of East and West Germany.