West Germany is the common English name for the Federal Republic of Germany or FRG (German: Bundesrepublik Deutschland or BRD) in the period between its creation on 23 May 1949 to German reunification on 3 October 1990. This period is referred to as the Bonn Republic (German: Bonner Republik) by academic historians, an earlier term being the Bonn State (German: Bonner Staat).[3]
During this period NATO-aligned West Germany and Warsaw Pact-aligned East Germany were divided by the Inner German border. After 1961, West Berlin was physically separated from East Berlin as well as from East Germany by the Berlin Wall. This situation ended when East Germany was dissolved and its five states joined the ten states of the Federal Republic of Germany along with the reunified city-state of Berlin. With the reunification of West and East Germany, the Federal Republic of Germany, enlarged now to sixteen states, became known simply as "Germany".
The Federal Republic of Germany was established from eleven states formed in the three Allied Zones of occupation held by the United States, the United Kingdom and France (the "Western Zones"). Its population grew from roughly 51 million in 1950 to more than 63 million in 1990. The city of Bonn was its de facto capital city (Berlin was symbolically named the de jure capital city in the West German Basic Law). The fourth Allied occupation zone (the East Zone, or Ostzone) was held by the Soviet Union. The parts of this zone lying east of the Oder-Neisse were in fact annexed by the Soviet Union and communist Poland; the remaining central part around Berlin became the communist German Democratic Republic (abbreviated GDR; in German Deutsche Demokratische Republik or DDR) with its de facto capital in East Berlin. As a result, West Germany had a territory about half the size of the interbellum democratic Weimar Republic.
At the onset of the Cold War, Germany (and, indeed, Europe) was divided among the Western and Eastern blocs. Germany was de facto divided into two countries and two special territories, the Saarland and divided Berlin. The Federal Republic of Germany claimed an exclusive mandate for all of Germany, considering itself to be the democratically reorganised continuation of the 1871-1945 German Reich. It took the line that the GDR was an illegally constituted puppet state. Though the GDR did hold regular elections, these were not free and fair. For all practical purposes the GDR was a Soviet puppet state.[4] From the West German perspective the GDR was therefore illegitimate.