Answer:
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 respective sectors of the city of Berlin, which lay entirely inside Russian-occupied East Germany.
Step-by-step explanation:
Alarmed by the new U.S. policy of giving economic aid to Germany and other struggling European nations, as well as efforts by the Western Allies to introduce a single currency to the zones they occupied in Germany and Berlin, the Soviets blocked all rail, road and canal access to the western zones of Berlin. Suddenly, some 2.5 million civilians had no access to food, medicine, fuel, electricity and other basic goods. Western powers began an airlift that lasted nearly a year and delivered vital supplies and relief to West Berlin.