The original one, I mean.

On June 26, 1948, the largest humanitarian operation in history began, later known as The Berlin Airlift, which prevented West Berlin from capitulating to the Soviet blockade.

When the wartime alliance between the Western Allies and the Soviet Union ended and friendly relations turned hostile, the question of whether the western occupation zones of Berlin would remain under Western Allied control or whether the city would be absorbed into Soviet-controlled East Germany led to the first crisis of the Cold War.