USA HISTORY

Detailed explanation-1: -The Truman Doctrine, also known as the policy of containment, was President Harry Truman’s foreign policy that the US would provide political, military, and economic aid to democratic countries under the threat of communist influences in order to prevent the expansion of communism.

Detailed explanation-2: -In general, Soviet foreign policy was most concerned with superpower relations (and, more broadly, relations between the members of NATO and the Warsaw Pact), but during the 1980s Soviet leaders pursued improved relations with all regions of the world as part of its foreign policy objectives.

Detailed explanation-3: -In 1962 the Soviet Union began to secretly install missiles in Cuba to launch attacks on U.S. cities. The confrontation that followed, known as the Cuban missile crisis, brought the two superpowers to the brink of war before an agreement was reached to withdraw the missiles.

Detailed explanation-4: -Gorbachev’s decision to allow elections with a multi-party system and create a presidency for the Soviet Union began a slow process of democratization that eventually destabilized Communist control and contributed to the collapse of the Soviet Union.