Canada War-Games US Invasion Scenario Amid Trump Tensions

Prime Minister Mark Carney has acknowledged what would have seemed unthinkable a generation ago: Canada's military is preparing for the possibility of an American invasion. Speaking to the New York Times last week, Carney framed the exercise as straightforward risk management. The scenario itself, he insisted, remains unlikely—Trump himself said in 2025 that military force against Canada was "highly unlikely." But the geopolitical ground has shifted enough that Canadian leadership now feels obligated to consider it.

The catalyst is unmistakable. Trump's sweeping global tariffs and his repeated public statements about making Canada the 51st state have prompted Ottawa to dust off contingency plans that haven't been seriously updated in a century. The White House responded to questions about the war games with a statement asserting that "President Trump has done more than anyone to protect the great people of Canada." Yet the fact that Carney felt compelled to discuss invasion scenarios at all signals how much the relationship has become a source of genuine anxiety north of the border. A Leger poll from January found that over 30 percent of Canadians believed a US invasion was likely, a figure that spiked after American forces captured Venezuelan President Nicolás Maduro.

Military experts consulted by the BBC largely agree that an actual invasion remains a distant prospect. Lieutenant-General Christopher Coates, who spent 34 years in the Royal Canadian Air Force and held senior command positions, said the idea strains credulity. "I was involved in military operations for my whole career, and we never considered the possibility that there would be a military attack coming from US territory," he told the BBC. The two nations are bound by NATO membership, which obligates mutual defense. They conduct joint Arctic operations through the North American Aerospace Defence Command and routinely share intelligence. These deep institutional ties make a conventional military assault almost unthinkable—though Coates suggested that if conflict came, it would more likely take the form of cyberwarfare than tanks and troops.

Canada's wariness of American power runs deeper than current headlines. The country's political identity was forged partly in resistance to US expansion. When American colonies rebelled against Britain in the 1770s, what would become Canada remained loyal to the Crown. The US subsequently invaded British North American territory, seizing Montreal in 1775 and nearly taking Quebec City. The War of 1812 saw repeated American incursions into what was then Upper Canada, Lower Canada, and the maritime colonies—a conflict that ended in stalemate and saw British forces retaliate by burning the White House. Tim Foran, a researcher at the Canadian War Museum, noted that "fear of the United States is foundational to the political project that is Canada." After World War I, as American power grew, Canadian military planners drafted contingency plans for conflict. Army generals posed as tourists, photographing bridges and highways along the border while gathering intelligence from local residents.

The current war-gaming exercise appears to be the first serious American invasion scenario Canada has modeled in roughly a century. According to reporting by the Globe and Mail, the Canadian military's theoretical model suggests that US strategic positions would overwhelm Canadian defenses within a week, forcing Canadian forces into guerrilla-style resistance. The scenario assumes that allied nations like France and Britain would be called upon to provide support. Lieutenant-General Coates characterized the modeling as relatively basic—Canada, he said, has lagged behind NATO allies in developing ground invasion response plans and is now scrambling to catch up. That urgency is reflected in recent calls from Canada's defense chief to dramatically expand the military, potentially adding as many as 300,000 lightly trained citizen soldiers.

Matthew Schmidt, an associate professor of national security at the University of New Haven, said the fact that Canada is preparing at all speaks to how radically the international order has shifted. He noted that Canadian leaders face a genuine dilemma: the close integration with American military systems—NORAD, NATO coordination, shared intelligence—provides valuable protection but also gives the US detailed knowledge of Canadian vulnerabilities. "It's really doing harm to relationships with the United States, and there's a certain amount of legitimate fear," Schmidt said. He acknowledged that most Americans dismiss Trump's 51st-state rhetoric as bluster, but Canadians are taking it seriously enough to prepare a defense.

An actual invasion would face obstacles even from the American side. Schmidt suggested that many US military officers would likely resign rather than execute such an order, viewing it as illegal and immoral. The two militaries have trained together for decades and share mutual professional respect. That said, if relations deteriorated to the point of conflict, Schmidt predicted the US would likely focus on acquiring Canadian resources—oil, minerals—and what he called "political decapitation," mirroring the operation that captured Maduro in Venezuela. Despite America's overwhelming military advantage, he said Canadian soldiers would be capable of mounting a credible fight. For now, the war games remain theoretical, a hedge against a future that most experts believe will never arrive. But the fact that Canada feels compelled to prepare suggests that the relationship between the two countries has entered genuinely uncertain terrain.