Cuban Missile Crisis - 1962
The Cuban Missile Crisis was the closest the world ever came to nuclear war. The United States armed forces were at their highest state of readiness ever and Soviet field commanders in Cuba were prepared to use battlefield nuclear weapons to defend the island if it was invaded. Luckily, thanks to the bravery of two men, President John F. Kennedy and Premier Nikita Khrushchev, war was averted. In 1962, the Soviet Union was desperately behind the United States in the arms race. Soviet missiles were only powerful enough to be launched against Europe but U.S. missiles were capable of striking the entire Soviet Union. In late April 1962, Soviet Premier Nikita Khrushchev conceived the idea of placing intermediate-range missiles in Cuba. A deployment in Cuba would double the Soviet strategic arsenal and provide a real deterrent to a potential U.S. attack against the Soviet Union.
MAD - 1960’s
Mutually Assured Destruction is a concept in nuclear warfare. During the Cold War, the US and the Soviet Union both had enough nuclear weapons to annihilate the other. Because of early detection systems, submarine launched missiles, and automatic computerized missile launches in case of the command structure being taken out, no matter who fired first the other side could fire back, even if the missiles had already hit. Basically, there was no way to "win" a nuclear war. You could kill them, but they would kill you. Because of this, neither side wanted to start a war, because that way they survived. It's one of the big reasons the two never had a nuclear war.
Vietnam War - 1965-1975
The war ended in April 1975 when the North Vietnamese took Saigon and the South Vietnamese government fell. The US part of the war ended with the truce in Jan. 1973. It took about 4 1/2 years to work out a settlement for the US to withdraw. American support personnel and embassy staff was in Vietnam until the very end until the North Vietnamese were taking over. There are dramatic pictures of helicopters getting American workers out and hundreds of South Vietnamese who worked for the Americans trying to scramble onto helicopters before the North Vietnamese got to them.
Détente - 1969-1979
The Cold War went on for a half a century as the two most powerful militaries ever assembled faced each other in Central Europe. Both sides had the capability to deal enough destruction to end life on this planet as we know it. Each side was armed with something like 30,000 nuclear weapons, any one of which was capable of leveling an entire city. Think about this for a moment. These two alliances were implacable enemies. Mistrust, espionage, dirty tricks and deceit characterized every interaction. Europe had been the site of three major wars in the sixty years before the start of the Cold War. If you looked at capabilities and history, there was no rational reason to believe that a "hot war" would not eventually break out from the Cold War.
Salt negotiations - 1972
The Strategic Arms Limitation Treaties refers to two rounds of bilateral talks and corresponding international treaties between the Soviet Union and the United States—the Cold War superpowers—on the issue of armament control. There were two rounds of talks and agreements: SALT I and SALT II. SALT II later became START. Negotiations started in Helsinki, Finland, in 1969 and focused on limiting the two countries' stocks of nuclear weapons. These treaties have led to START (Strategic Arms Reduction Treaty). START I (a 1991 agreement between the United States and the Soviet Union) and START II (a 1993 agreement between the United States and Russia) placed specific caps on each side's number of nuclear weapons.
Iranian Revolution - 1979
Defeat at war, a financial crisis, peasant rebellion, gigantic national debt,disgruntled military, the Shah's closeness to Western powers, Westernization including the adoption of the Gregorian calendar, extravagance, corruption, elitism, failure to watch Islamist leaders like Ayatollah Khomeini, repression, despotism, economic failure, antagonizing formerly apolitical Iranians by established a one-party state, overconfidence, preoccupation with being a leader during the oil crisis and neglecting his own country's needs, underestimation of opposition, failure to prepare, the personality of the Shah which caused him to suppress opposition, charisma and success of Khomeini, overconfidence of secular forces, cycle of mourning that kept anti-Shah momentum alive, cleverness of Khomeini and his followers, policies of the American leaders that made the Shah look like a puppet, failure to detect the for coming revolution and OPEC policies that discourage infighting and unintentionally put Khomeini in a good position for revolution.