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| 1962, June 18 |
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| The ruling Conservative Party lost its parliamentary majority in national elections | 1 |
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| 1963, Jan. 31 |
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| Prime Minister Diefenbaker reacted to the U.S. State Department's criticism (Jan. 30) of Canada's lack of plans to equip its defense forces with nuclear weapons by denouncing it as an unwarranted intrusion. | 2 |
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| Feb. 6 |
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| Following a defeat of the Diefenbaker government on its nuclear weapons policy (Feb. 5), Parliament was dissolved and elections were scheduled. | 3 |
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| April 8 |
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| The Liberal Party won the general elections by receiving a plurality of 129 seats in the House of Commons. Lester B. Pearson took office on April 22 as Liberal prime minister. | 4 |
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| May 11 |
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| U.S. president Kennedy and Prime Minister Pearson agreed to equip Canadian missiles with U.S.-supplied nuclear warheads. | 5 |
| Front de libération du Québec (FLQ) was formed. The organization soon protested Quebec's dependent status within the Dominion by placing bombs in mailboxes. | 6 |
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