Canada in the Cold War in power believed that as long as the US president retained absolute control of the nuclear weapons, Canadian forces could be ordered to undertake nuclear missions for the US without Canadian consent. During the Cuban Missile Crisis, Canada was expected to fall in line with American foreign policy, in that Canada's military forces were expected to go on immediate war alert status. Diefenbaker however, refused to do so emphasizing the need for United Nations intervention. It would only be after a tense phone call between President John F. Kennedy and Diefenbaker that Canada's armed forces would begin preparations for "immediate
Cuban Missile Crisis on how to resolve the crisis had been made exclusively by Kennedy and Khrushchev. Castro was especially upset that certain issues of interest to Cuba, such as the status of the US Naval Base in Guantánamo, were not addressed. That caused Cuban–Soviet relations to deteriorate for years to come. On the other hand, Cuba continued to be protected from invasion. The worldwide US Forces DEFCON 3 status was returned to DEFCON 4 on November 20, 1962. General Curtis LeMay told the President that the resolution of the crisis was the "greatest defeat in our history"; his was a minority position.