The Berlin Blockade was an attempt in 1948 by the Soviet Union to limit the ability of the United States, Great Britain and France to travel to their sectors of Berlin, which lay within Russian-occupied East Germany.
On June 24, 1948, the Soviet Union blocked all road and rail travel to and from West Berlin, which was located within the Soviet zone of occupation in Germany. The Soviet action was in response to the refusal of American and British officials to allow Russia more say in the economic future of Germany.