Prime Minister Mark Carney addresses military contingency planning amid strained U.S. relations.

Canadian Prime Minister Mark Carney described U.S. military action against Canada as an “extreme tail risk”—highly unlikely but potentially devastating—and said it would be irresponsible not to prepare. Defence Minister David McGuinty said governments and militaries routinely assess such scenarios; reporting has indicated that the Canadian Armed Forces modeled a hypothetical invasion and possible responses, though Carney declined to discuss contingency-planning details. The remarks came amid strained U.S.-Canada relations, including President Donald Trump’s past talk of making Canada the 51st state and an escalating tariff dispute. NDP MP Don Davies said the prospect reflected profound uncertainty in the relationship, while former foreign affairs minister Peter MacKay warned that public discussion could heighten anxiety. Analysts said planning for remote threats can strengthen readiness for other risks, including cyber and hybrid attacks.
According to reporting cited by The Globe and Mail, Canadian military planning considered responses using tactics similar to those employed against Russia and later by U.S.-led forces in Afghanistan.
The Conversation noted that Canada considered a possible conflict with the United States in its interwar Defence Scheme No. 1, while U.S. planners developed their own War Plan Red.
Amid the invasion-planning reports, Trump posted that Canada was “destroying itself” by allowing millions of people into the country who were “essentially unchecked and unvetted.”
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