History of Germany (1945–1990)

From 1945 to 1990, the divided Germany began with the Berlin Declaration, marking the abolition of the German Reich and Allied-occupied period in Germany on 5 June 1945, and ended with the German reunification on 3 October 1990. Following the collapse of the Third Reich in 1945 and its defeat in World War II, Germany was stripped of its territorial gains.

Source: Wikipedia — History of Germany (1945–1990) (CC BY-SA 4.0)