Between 1945 and 1949, a number of events led the two superpowers to oppose each other.
The Truman Doctrine was followed in June 1947.
The Soviet Union responded to Marshall Plan by founding the Council for Mutual Economic Assistance.
The Federal Republic of Germany, or West Germany, was formally created.
The North Atlantic Treaty Organization (NATO) was formed in April 1949.
Chinese Communist took control of the government in China , strenghtening U.S fears.
The Soviets sent Sputnik I, the fist human made space satellite.
Kennedy found out that Soviet ships was carrying Missles.
President Lyndon B. Johnson increased number of U.S troops were sent to Vietnam.
President Nixon reached an agreement with North Vietnams Leader that allowed U.S to withdraw its armed forces.