1. The 1950s marked the beginning of the Cold War between the United States and the Soviet Union.

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1.
Tensions
2.
Nuclear
3.
Arms Race
4.
Espionage
5.
Superpowers
6.
Iron Curtain
7.
Containment
8.
Space Race
9.
Deterrence
10.
Proxy Wars
11.
Berlin Wall
12.
Cuban Missile
13.
Mutual
14.
Propaganda
15.
Détente
16.
Sputnik
17.
Marshall Plan
18.
Truman
19.
NATO
20.
Warsaw Pact
21.
Cold War Era