Answer: Signing of the NATO treaty
When the Soviets blockaded Berlin, the United states responded by an airlift.
The Berlin Blockade was done by the Soviets between the period of 24th June of the year 1948 and 12th May of the year 1949.
This was the first major crisis after the second World War.
The Soviets had blocked railroute, canal route and roadways to areas of Germany that were controlled by the western allies.
So the Western allies took to the skies and arranged for airlifts to bring supplies to the people of Berlin.
This ultimately showed the Soviets that the blockade was a complete failure.
