Formal unification of Germany into the modern nation-state commenced on 18 August 1866 with the North German Confederation Treaty establishing the Prussia-led North German Confederation, which became the German Empire in 1871. After World War I and the German Revolution of 1918–1919, the Empire was replaced by the Weimar Republic. The Nazi rise to power in 1933 led to the establishment of a totalitarian dictatorship, World War II, and the Holocaust. In 1949, after the war and a period of Allied occupation, Germany was organized into two separate polities with limited sovereignty: the Federal Republic of Germany, or West Germany, and the German Democratic Republic, or East Germany. Berlin continued its de jure Four Power status. The Federal Republic of Germany was a founding member of the European Economic Community and the European Union, while the German Democratic Republic was a communist Eastern Bloc state and member of the Warsaw Pact. After the fall of the communist led-government in East Germany, German reunification saw the former East German states join the Federal Republic of Germany on 3 October 1990.
Formal unification of Germany into the modern nation-state commenced on 18 August 1866 with the North German Confederation Treaty establishing the Prussia-led North German Confederation, which became the German Empire in 1871. After World War I and the German Revolution of 1918–1919, the Empire was replaced by the Weimar Republic. The Nazi rise to power in 1933 led to the establishment of a totalitarian dictatorship, World War II, and the Holocaust. In 1949, after the war and a period of Allied occupation, Germany was organized into two separate polities with limited sovereignty: the Federal Republic of Germany or West Germany, and the German Democratic Republic, or East Germany. Berlin continued its de jure Four Power status. The Federal Republic of Germany was a founding member of the European Economic Community and the European Union, while the German Democratic Republic was a communist Eastern Bloc state and member of the Warsaw Pact. After the fall of the communist led-government in East Germany, German reunification saw the f,ormer East German states join the Federal Republic of Germany on 3 October 1990.