Final answer:
Mutually Assured Destruction (MAD) was the reality that a nuclear war between the United States and the Soviet Union would result in complete destruction.
Step-by-step explanation:
The reality that a nuclear war between the United States and the Soviet Union would result in complete destruction was called Mutually Assured Destruction (MAD). MAD was a doctrine that emerged during the Cold War, emphasizing that both sides possessed enough nuclear weapons to ensure the annihilation of the other, which acted as a deterrent against starting a nuclear war.
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