The Munich Pact was an agreement made between the major European powers in 1938, which allowed Germany to occupy the Sudetenland, then part of Czechoslovakia. The agreement was primarily the result of British, French, and German diplomatic maneuvering. As part of the agreement, Hitler promised to halt his desire for territorial expansion. At the time it was viewed as a successful measure to avoid war; however it quickly began to be seen as a catastrophically failed and  act of appeasement. The Pact was important for the United States, because it precipitated a series of events that would draw the United States into the conflict. Had war in Europe been declared in 1938, as opposed to 1939, the United States would have had less time to prepare, and the whole conflict might have gone differently.

The Potsdam Conference convened in occupied Germany in July and August of 1945. It was a meeting of the heads of state of the victorious powers (the Soviet Union, Great Britain, and the United States). The purpose for the Conference was to sign a series of post-war treaties, to decide how to organize war ravaged Europe and to establish order throughout the world. The United States was represented by Harry S. Truman who had very recently succeeded to the presidency, following the death of Franklin D. Roosevelt.

The Camp David Accords were signed by Egyptian President Anwar El Sadat and Israeli Prime Minister Menachem Begin in 1978. The agreement was initially designed to end decades of Arab and Israeli hostilities, but later evolved into a concerted effort to promote bilateral agreements between Egypt and Israel. The agreement represented the culmination of a year’s intense diplomatic work by President Jimmy Carter. The specific terms of the two accords provided for demilitarization of the border between the two nations, the promise that they would work together to establish a legitimate Palestinian governing body, and that both countries would receive regular aid from the United States. 

President Jimmy Carter was present at Camp David, in 1978, when the Peace process was formalized. In the months leading up to the agreement, Carter had travelled extensively throughout the Middle East, meeting with heads of state in an attempt to see how peace between the Arab nations and Israel could be established.

It was President Ronald Reagan who issued this challenge to the reform-minded Soviet leader, Mikhail Gorbachev.  The Berlin Wall eventually fell on November 9th, 1989.

The Red Scare of the 1950s was aimed at an increasing fear of Communists infiltrating the United States Government. Thanks to the spread of Soviet-style Communism throughout Eastern Europe in the late 1940s and victory by Mao Tse Tung's Communists in China, Communism had reached its apex by 1950. In the American government, worries that Soviet spies were leaking secrets to Moscow continued to grow. Many members of the Communist Party of the United States of America (CPUSA) were brought to testify in front of the House Un-American Activities committee in the late 1940s, resulting in the dismissal of many government officials and the creation of the Hollywood blacklist. By leading a series of committees which attempted to find communists in various parts of government, Wisconsin Senator Joseph McCarthy became the most famous "red hunter" in the congress.

On June 27th, 1950, in order to assist non-Communist forces on the Korean peninsula, President Harry Truman sent U.S. troops to help push back the Communists who had invaded South Korea.

On August 6th and August 9th of 1945, the U.S. dropped an atomic bomb on Hiroshima and Nagasaki, resulting in the Japanese surrender of World War II.

In 1962, President Kennedy ordered the naval blockade of Cuba which many believe pushed the USA and the USSR perilously close to conflict, until the Soviet Union eventually withdrew.

The U.S. invaded Caribbean nation of Grenada in response to the coup orchestrated by a Marxist faction within the Grenadine government.