Why was West Berlin given a special political status after World War II?

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After World War II, Germany was divided into four occupation zones controlled by the United States, the United Kingdom, France, and the Soviet Union. Although Berlin was located deep within the Soviet-controlled zone, the city itself was also partitioned into four sectors to be administered jointly by the Allied powers.12

This arrangement was established by agreements reached in 1944 and confirmed at the Potsdam Conference in 1945. Because the city was intended to be under joint four-power authority, the sectors of Berlin were considered to be within, but not part of, the Soviet zone of occupation.3

As ideological tensions between the Western Allies and the Soviet Union escalated into the Cold War, this administrative division solidified into a political one. West Berlin—comprising the American, British, and French sectors—became an enclave of Western influence and democracy, while East Berlin aligned with the Soviet-backed German Democratic Republic. This unique status persisted until German reunification in 1990.1345