After 1945, Germany was not just divided; it was a patchwork of international occupation.

History · Published 29 September 2026 Swipe more like this →

In short: Following the total dissolution of the Nazi government in 1945, the Allies partitioned Germany into four distinct zones. Yet, this map was far more complex than history books suggest, featuring exclaves, temporary border shifts, and military garrisons from nations as diverse as Belgium, Denmark, Luxembourg, and the Netherlands.

The occupation began on 5 June 1945, following Germany's formal surrender on 8 May. While the United States, United Kingdom, Soviet Union, and France held primary authority through the Allied Control Council, the reality on the ground was a fluid, often improvised administrative landscape. The Potsdam Agreement in August 1945 redefined Germany's eastern borders, detaching vast territories east of the Oder–Neisse line and placing them under Polish and Soviet administration, effectively removing them from the occupied German state.

Within the western zones, the administrative map was constantly redrawn. The American zone, headquartered in the former IG Farben Building in Frankfurt, included exclaves like Bremen and Bremerhaven, which were geographically isolated within the British zone. Meanwhile, the British zone hosted a variety of international forces. Belgian troops garrisoned a 200-kilometre strip, and Polish units—initially intended to form a formal zone for displaced persons—administered the Emsland region until 1947. Even the Swiss government became involved, facilitating transit for French troops to reach the German exclave of Büsingen.

Governance fractured as Cold War tensions rose. The Allied Control Council ceased effective operation on 20 March 1948, leading to the creation of the Federal Republic of Germany in May 1949 and the German Democratic Republic in October 1949. Despite these states gaining sovereignty in 1955, full legal authority over 'Germany as a whole' remained with the Allies until the 1990 reunification. The final occupation troops did not depart until 1994, though Belgian forces maintained a presence until 2005.

The complexity extended to Berlin, which remained under four-power occupation until 1990, despite being located deep within the Soviet zone. This period of 'zero hour' saw the country transition from a devastated, infrastructure-poor territory to a front line of the Cold War, where the shifting of borders and the management of millions of expellees defined the early years of the post-war order.

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