Today I learned that after Free France captured St. Pierre and Miquelon during Christmas of 1941 that the British and Americans proposed "neutralization" of the islets because of their still-existent ties to the Vichy regime... by having a joint occupation of the place by US and Canadian forces. Secretary of State Cordell Hull initially wanted to return the islands to Vichy France as soon as possible, while Churchill made the counterproposal of continued occupation, just by anyone but either French government.
If that compromise were to be accepted by de Gaulle, that may have led to the islands being given the option to either rejoin France or potentially to join Canada, something which French Canadians may insist to be put up for referendum because during the course of the war French Canadians were quite supportive of Pétain and his policies, especially in regard to his patronage of Catholicism. That last part is pure speculation but it might be the only way that that territory could realistically be attached to Canada outside of an earlier Franco-British War in the 19th or early 20th century.