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 to endorse the missile swap but others continued to oppose the offer. Finally, Kennedy ended the debate. "We can't very well invade Cuba with all its toil and blood," Kennedy said, "when we could have gotten them out by making a deal on the same missiles on Turkey. If that's part of the record, then you don't have a very good war." Kennedy immediately responded, issuing a statement calling the letter "an important and constructive contribution to peace." He continued this with a formal letter: Kennedy's planned statement would also contain suggestions he had received from his adviser Schlesinger Jr.