After the Soviet Union blocked all rail, highway, and water traffic between western Germany and Berlin, the U.S. and Britain responded by sending airplanes with food and supplies into West Berlin. This was a way for them to respond to the Soviets without using military force. The Soviet Union, however, did not try to stop the airlift, for fear of war. Eventually, after supplies had been airlifted for more than a year, the Soviets lifted the "Iron Curtain".
"I think I hear planes! We must be getting more goods delivered!"
In 1949, the same year the Soviets got rid of the "Iron Curtain", the U.S. joined nine other Western European countries, along with Iceland and Canada. This alliance formed the North Atlantic Treaty Organization. Each member promised to defend one another if attacked.
Formation of NATO
"We should continue to help the Western European countries."
"I say we ally with those countries."
About 6 years after NATO, the Soviet Union developed the Warsaw Pact. It allowed a unified system of military command between the Soviet Union and its Eastern European-controlled countries. Once the Cold War ended, many former Warsaw Pact members joined the NATO, which is still around today.
"We shall create an alliance of our own! We will defend Eastern Europe!"