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Berlin Wall
The Berlin Wall was built. Half of Berlin was controlled by the Soviet Union while the other half was controlled by the United States. They promoted different policies within their regions. The relation between the United States and the Soviet Union fell to the icepoint. http://faculty.washington.edu/qtaylor/a_us_history/cold_war_timeline.htm -
Cuban Missile Crisis
The United States detected that The Soviet Union stored nuclear weapons in Cuba, which was only 90 miles away from the United States. The United States was ready for an attack. The war almost started. -
Moscow-Washington Conference
American President JFK called Moscow to discuss the nuclear weapon. They agreed to not use the weapon. The relationship between the United States and the Soviet Union became a little more friendly. http://www.cryptomuseum.com/crypto/hotline/ -
President Nixon visited China
President Nixon became the first American president to visit China. Since then, U.S. and China establish diplomatic relations. https://en.wikipedia.org/wiki/1972_Nixon_visit_to_China -
South Vietnam fell to Communist force
The Soviet Union controlled South Vietnam and turned it to a Communist country. The United States subsequently sent troops to Vietnam to help the rest of the Vietnam. http://www.huffingtonpost.com/2015/04/30/40-anniversary-vietnam-photos-saigon-us_n_7180464.html