On what issue was John Diefenbaker defeated on?

Question

He had a minority government in 1963, and was defeated by a vote of non confidence on what issue?

Answer 1

The issue of accepting nuclear warheads.  Diefenbaker was opposed to this.

Answer 2

Many people believe that it all actually started when he cancelled the Avro Arrow in 1959.  Diefenbaker's final term of office saw the escalation of a nuclear arms question.  Diefenbaker rejected American nuclear warheads being put in missiles, warplanes and ground-based tactical rockets. He used Congressional testimony about the Bomarc missiles to accuse Liberal leader Lester B. Pearson of making Canada a target for a nuclear war, and accused American media outlets and the US government of interfering with the election.   While Diefenbaker and his allies opposed the nuclear warheads, many other Tories and the opposition parties supported them, saying that the Bomarc missiles would be useless without the warheads. The already strained relationship within the Conservative party deteriorated faster, and a Cabinet split further undermined the government. Minister of National Defence Douglas Harkness resigned from Cabinet on 4 February 1963 because of Diefenbaker's opposition to accepting the missiles. The next day, the government lost two non-confidence motions on the issue, as the Social Credit and the CCF withdrew their support of the government.  He then lost the election to Lester Pearson and the Liberals, but he continued on as leader of the Progressive Conservative party, with some turmoil and discontent in the party, until the leadership convention of 1967.