The Cuban Missile Crisis occurred in October 1962 and is widely considered to be the closest the world has ever come to nuclear war. The crisis was sparked by the discovery of Soviet nuclear missiles in Cuba, just 90 miles from the United States. In response, the United States imposed a naval blockade on Cuba and demanded the removal of the missiles. After several days of intense negotiations, the Soviet Union agreed to remove the missiles in exchange for a pledge from the United States not to invade Cuba. The Cuban Missile Crisis is seen as a major turning point in the Cold War and is often credited with preventing a nuclear war between the United States and the Soviet Union.