Answer:
North Atlantic Treaty Organization (NATO) and the Warsaw Pact were mirror images of each other. NATO was established in 1949 out of fears that the Soviet Union under Joseph Stalin would aggressively try to spread communism into Western Europe. The Warsaw Pact was created in response to NATO, which the Soviets understood as an organization dedicated to the destruction of the Soviet Union. Each organization operated on the principle of "collective security,"., that an aggression against one member nation was an aggression against them all. If West Germany (which joined NATO in 1955) had been attacked by Soviet forces, for example, other NATO countries would respond militarily.
Step-by-step explanation: