Nadine Yousif; Robin Levinson-King - in Toronto
Sat, October 3, 2026
BBC

[Getty Images]
Prime Minister Mark Carney admitted last week that he has prepared for a once-unthinkable scenario - a US invasion.
Noting the risk was low and the likelihood highly improbable, he told the New York Times he had a responsibility to consider all possibilities as the US-Canada relationship is redefined under the Donald Trump presidency.
"That's just risk management," Carney said.
Trump's global tariffs and his often-repeated desire to make Canada the 51st state has led Canada to war game an attack by the Americans.
In 2025, the US president said it was "highly unlikely" that the US would ever use force against Canada. Instead he said, he would continue to exert economic pressures to obtain political aims.
"President Trump has done more than anyone to protect the great people of Canada," the White House told the BBC in a statement this week.
Military experts who spoke to the BBC also think an invasion is a long shot, pointing to the multiple ways the two countries work together on defence.
But the issue is clearly weighing on Canadians' minds.
In January, after the US captured Nicolás Maduro in Venezuela, a Leger poll suggested that over 30% of Canadians believed that a US invasion was likely.
Why it is unlikely to happen
A war between Canada and the US would be complicated and almost difficult to imagine, said Lt-Gen Christopher Coates, a former military officer of 34 years with the Royal Canadian Air Force who held various senior positions
"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.
Coates, who had served on Nato missions, noted that Canada and the US collaborate on many aspects of military defence.
They are both members of the north Atlantic defence alliance, which mandates members to defend a fellow member-nation should they be attacked.
The two countries also conduct joint Arctic defence missions under the North American Aerospace Defence Command (NORAD), and frequently share intelligence.
Because of this, Coates said he believes an attack by the US on Canada would not begin with an armed assault, but rather with more discreet means like cyberwarfare.
After President Trump shared an AI meme with gun-toting geese, the BBC's Jessica Murphy asks how Canada could hit back economically
Not always the best of friends
After World War II, Canada and the US became natural allies for the latter part of the 20th Century, and have become heavily integrated economically, militarily and culturally.
But it wasn't always this way. In fact, a core tenet of Canada's identity is its resistance of US expansionism in the 18th and 19th Centuries, said Tim Foran, a researcher with the Canadian War Museum.
"Fear of the United States is foundational to the political project that is Canada," he said.
Canada was formed as a collection of British North American colonies who remained loyal to the British Crown when the colonies in the modern-day US rebelled.
Before the formation of Canada, the US had attempted to invade British North American colonies, taking control of Montreal in 1775 and nearly conquering Quebec City.
In the war of 1812, the Americans invaded what was known then as Upper Canada, Lower Canada and the maritime colonies repeatedly, resulting in a stalemate. During that war, British troops famously burned down the White House in retaliation.
Foran said that at the time, the colonies that later became Canada relied on Great Britain and its Royal Navy for its defence, as well as indigenous peoples who served as generals in major battles.
Canada again contemplated war with the US post-World War I in response to its growing power and influence.
It drafted a plan that was informed by secret trips to border cities made by Canadian army generals, who would pose as tourists and snap photos of bridges and highways for intelligence.
They also spoke to local residents to better understand their enemy.
A war was an unlikely scenario then, said Andrew Burtch, a researcher with the Canadian War Museum with expertise on Canada in the 20th Century, but the Canadians still wanted to be prepared.
"That's part of what militaries do," he said. "They envisage all sorts of different scenarios."

Canada-US relations have deteriorated under the second Trump presidency. [Getty Images]
What a US invasion could look like
Even if a US invasion is extremely unlikely, Matthew Schmidt, an associate professor of national security at the University of New Haven in Connecticut, said the fact that Canadians were preparing was a sign of just how drastically the global order has shifted.
He added Canadian leaders do have hard questions to ask about how closely they want to continue working with the American military - a partnership that gives them valuable information should they want to harm Canada in any way.
"It's really doing harm to relationships with the United States, and there's a certain amount of legitimate fear," he said.
Americans might not take Trump's comments about making Canada the 51st state seriously, he said, but Canadians clearly do - and are prepared to defend themselves if needed.
So what would it be like if it happened?
The first phase of a war could be quite short.
According to the model used by the Canadian military, as reported on by the Globe and Mail newspaper earlier this year, a US attack would see Canada's strategic positions overwhelmed within a week
Its military would quickly be outnumbered, forcing Canadian forces to resort to guerilla-type warfare to try to suppress their enemy.
Allied nations like France and Britain would be called on to provide support and defence for Canada, the newspaper reported in January, citing senior government officials.
The theoretical model is believed to be the first time in a century that Canada planned for an American assault.
The modelling is on the lighter end of military combat planning, Coates said.
He said that Canada, unlike its Nato allies, was lagging behind when it came to having a response plan in place in the event of any ground invasion, and that it was now playing catch-up in this era of unpredictable geopolitics.
Part of that, he said, was made evident by a recent call by Canada's defence chief to drastically increase the size of its military, including the addition of as many as 300,000 lightly trained citizen soldiers.
An invasion of Canada might not be straightforward from the US point of view either.
Even with its outsized military, the US would have a difficult time getting buy-in for a fight with Canada, said Schmidt.
"I think you would have a large number of American officers who would resign if given the order to invade Canada," he said.
"They would see it as an illegal and immoral order."
Schmidt said Canadian soldiers and American soldiers routinely train together, and share a mutual respect.
But in the unlikely scenario that relations would deteriorate to the point of combat, Schmidt said the US would likely focus on acquiring valuable Canadian resources like oil and minerals, and political decapitation.
"You would see a a kind of operation that would mirror perhaps what you saw in Venezuela," he said, referring to US military action earlier this year to capture former Venezuelan President Maduro.
Although he acknowledged the US has greater military capacity, he said that "pound for pound" Canadian soldiers would be able to put up a fight.
‘Spit on our sacrifice’: Canadian veterans fume after Trump and allies take jibes at military
John Semley
Tue, October 6, 2026

Canadian troops launch their assault on the Whale's Back in Eastern Afghanistan 13 March 2002.Photograph: Canadian Press/ShutterstockMore
On the morning of 11 September 2001, Perry Chalmers was running drills for the Royal Canadian Regiment's specialised mortar platoon in New Brunswick when he heard the news: America was under attack. Word quickly spread across the base. "I went inside to watch the news," the former corporal recalls. "And there was a huge feeling of – and you're going to have to excuse me – holy shit. What the fuck just happened?"
Chalmers called his wife, who informed him that, just before 10:30am, the second of the World Trade Center towers had fallen. With that, his battalion was put on notice: dispatched to nearby airports to assist in the forced landings of commercial aircraft after the shutdown of North American airspace.
The Canadian troops went to retrieve their rucksacks and any other necessities, should they need to spring into action at a moment's notice. As Chalmers recalls: "Things started to happen really quickly."
Chalmers would deploy to Afghanistan, on a nine-month tour of combat duty, where he saw combat alongside US troops. He put his mortar platoon training to good use, as a counter-IED engineer, dealing with the threat of improvised explosives in conjunction with the US army's 10th Mountain Division.
He was one of more than 40,000 members of the Canadian armed forces who served in Afghanistan, supporting US and Nato operations. The Canadians lost 158 lives. In 2007, a stretch of Ontario's highway 401 was rechristened the "Highway of Heroes" to commemorate the convoys of fallen soldiers ferried between the military base in Trenton, Ontario, and the coroner's office in Toronto.
This response to 9/11 was consistent with the longer history of Canadian-US military cooperation. About 14,000 Canadians landed on Juno Beach in Normandy on D-day during the second world war. More than 26,000 Canadians served in the Korean war. While Canada did not officially participate in the Vietnam war, an estimated 30,000 Canadians headed across the border to volunteer for the US military.
Over the course of the war in Afghanistan, Chalmers can count 35 fellow Canadian troops who lost their lives. But he never really brooked any regrets, or bad feelings, about his role in the US-led war. "My experience was that we were participating in an operation to help our brothers and sisters in the United States," he says. "None of them ever snubbed their noses at us. We were treated as equals, and respected, for what we brought to the table."
But no longer. While calling Canada "a state", US vice-president JD Vance recently commented that it "had underinvested in its military that quite literally would get invaded by a foreign country were it not for the umbrella of protection provided by the United States of America".
Going one step further, Donald Trump's transportation secretary, Sean Duffy, told Fox News that Canada "doesn't have a military".
Self-styled "secretary of war" Pete Hegseth has spent time on X, mocking Canadian cadets and criticising a Canadian coast guard detachment for taking part in a Pride celebration. Trump himself was criticised earlier this year for claiming that Canadian and other Nato forces in Afghanistan were "never needed", claiming these allies "stayed a little back, a little off the frontlines".
The remarks have been condemned at the highest level of the Canadian government. The defence minister, David McGuinty, described Hegseth's social media posts as "below the dignity of the office he holds". Amid a serious diplomatic dispute between the two nations, the prime minister, Mark Carney, accused Trump and Hegseth of "doing memes".
"It's disrespect and betrayal," Chalmers says. "It makes me very angry."
"It's really hard to hear how ungrateful they are, especially Vance, who served," said Chris Banks, a retired Canadian army sergeant with nearly two decades of experience. "To hear him spit on our sacrifice is insulting, it's hurtful, and it's disrespectful to the dead. On the other hand, these men have proven themselves nothing more than children. So when I heard JD Vance say it, it's like, 'Oh, good. Dumbass said something else'".
Banks deployed to Afghanistan in 2008, where he was part of a Canadian platoon that laid down cover fire for Americans under attack from the Taliban. To this day, he still has vivid memories of taking cover in a ditch near Pashmul, alongside an American platoon, looking up as the trees overhead were shredded by shrapnel.
He says he was proud to serve. But when he came home to Ontario in 2009, he felt something had changed. He began drinking heavily – sometimes as much as a litre of vodka a day – and struggling with suicidal thoughts. All hallmarks of PTSD. He received treatment, and now advocates for the mental health and wellbeing of other Canadian veterans. Still, a tinge of bitterness remains, when he thinks back on fighting on behalf of the US.
"I lost a part of myself," he says. "In that war we fought, for them."
***
Nancy Payne still remembers exactly where she was when she found out her son had died. Cpl Randy Payne served with a military police unit, stationed in Wainwright, Alberta. He was part of a specialised close protection team, charged with safeguarding high-ranking officers, government officials and other VIPs, in war zones.
On 22 April 2006, an armoured vehicle triggered a roadside bomb outside Kandahar airbase, killing Payne and three other Canadian soldiers. It was the deadliest attack on Canadian forces since 2002 – when four Canadian soldiers were killed by a US bomb after a disastrous friendly fire incident at the Tarnak Farms training facility in Afghanistan.
Nancy was at home, alone, when the phone rang in the dead of the night. It was her son's commanding officer. "When you get a call at three in the morning from Randy's boss, you know it's not good news," she recalls, speaking over the phone from her home in Lansdowne, Ontario. "I just kept saying 'Not my Randy … not my Randy'."
In 2025, the Royal Canadian Legion awarded Nancy a Silver Cross, a commendation for Canadian military mothers. She laid a wreath at the national war memorial during the Remembrance Day ceremony in Ottawa.
More locally, she has commemorated her son with a prize – "the Captain's Award" – bestowed to students who distinguish themselves in athletics and leadership at his former high school. She, too, is unnerved by the US attacks on the Canadian military and veterans like her son. "What they're saying is not right," she says. "We were neighbours for so long. That's all changed, now."
Nancy is not the only military mother who feels this way. Earlier this year, Jane McKay, mother of deceased Master Cpl Tim Wilson, penned an op-ed for the Toronto Sun newspaper taking aim at the Trump administration. "Trump has no respect for any soldier – American, or Canadian, or those from the Nato alliance," she wrote. "He owes them all an apology."
Some US politicians have tried to make amends. On 1 September, Arizona Democrat senator Rueben Gallego travelled to Ottawa on an official congressional trip. The goal was to strengthen the weakening trade relations between the two nations. But Gallego made a point of singling out Hegseth's anti-Canadian military tweets as "deeply disrespectful to the men and women of Canada that have died fighting with us".
For veterans like Chalmers, such lip service may be too little, too late. He used to play tabletop strategy games with a group of civilian friends in the US, via the online social platform Discord. That all ended when they laughed off his concerns about Trump's talk of Canada becoming the "51st state". Banks used to routinely take his family across the border for vacations and stateside shopping trips. No more. "I loved working with Americans, I loved training with them," he says. "But now it's hard to have that same level of empathy."
Would he eagerly enlist to help the US again?
"What would happen if there was another hypothetical 9/11?" he says. "I hate to say it, but why would any nation, ever again, partner with the United States, if this is how they treat their closest neighbour and ally?"
John Semley
Tue, October 6, 2026

Canadian troops launch their assault on the Whale's Back in Eastern Afghanistan 13 March 2002.Photograph: Canadian Press/ShutterstockMore
On the morning of 11 September 2001, Perry Chalmers was running drills for the Royal Canadian Regiment's specialised mortar platoon in New Brunswick when he heard the news: America was under attack. Word quickly spread across the base. "I went inside to watch the news," the former corporal recalls. "And there was a huge feeling of – and you're going to have to excuse me – holy shit. What the fuck just happened?"
Chalmers called his wife, who informed him that, just before 10:30am, the second of the World Trade Center towers had fallen. With that, his battalion was put on notice: dispatched to nearby airports to assist in the forced landings of commercial aircraft after the shutdown of North American airspace.
The Canadian troops went to retrieve their rucksacks and any other necessities, should they need to spring into action at a moment's notice. As Chalmers recalls: "Things started to happen really quickly."
Chalmers would deploy to Afghanistan, on a nine-month tour of combat duty, where he saw combat alongside US troops. He put his mortar platoon training to good use, as a counter-IED engineer, dealing with the threat of improvised explosives in conjunction with the US army's 10th Mountain Division.
He was one of more than 40,000 members of the Canadian armed forces who served in Afghanistan, supporting US and Nato operations. The Canadians lost 158 lives. In 2007, a stretch of Ontario's highway 401 was rechristened the "Highway of Heroes" to commemorate the convoys of fallen soldiers ferried between the military base in Trenton, Ontario, and the coroner's office in Toronto.
This response to 9/11 was consistent with the longer history of Canadian-US military cooperation. About 14,000 Canadians landed on Juno Beach in Normandy on D-day during the second world war. More than 26,000 Canadians served in the Korean war. While Canada did not officially participate in the Vietnam war, an estimated 30,000 Canadians headed across the border to volunteer for the US military.
Over the course of the war in Afghanistan, Chalmers can count 35 fellow Canadian troops who lost their lives. But he never really brooked any regrets, or bad feelings, about his role in the US-led war. "My experience was that we were participating in an operation to help our brothers and sisters in the United States," he says. "None of them ever snubbed their noses at us. We were treated as equals, and respected, for what we brought to the table."
But no longer. While calling Canada "a state", US vice-president JD Vance recently commented that it "had underinvested in its military that quite literally would get invaded by a foreign country were it not for the umbrella of protection provided by the United States of America".
Going one step further, Donald Trump's transportation secretary, Sean Duffy, told Fox News that Canada "doesn't have a military".
Self-styled "secretary of war" Pete Hegseth has spent time on X, mocking Canadian cadets and criticising a Canadian coast guard detachment for taking part in a Pride celebration. Trump himself was criticised earlier this year for claiming that Canadian and other Nato forces in Afghanistan were "never needed", claiming these allies "stayed a little back, a little off the frontlines".
The remarks have been condemned at the highest level of the Canadian government. The defence minister, David McGuinty, described Hegseth's social media posts as "below the dignity of the office he holds". Amid a serious diplomatic dispute between the two nations, the prime minister, Mark Carney, accused Trump and Hegseth of "doing memes".
"It's disrespect and betrayal," Chalmers says. "It makes me very angry."
"It's really hard to hear how ungrateful they are, especially Vance, who served," said Chris Banks, a retired Canadian army sergeant with nearly two decades of experience. "To hear him spit on our sacrifice is insulting, it's hurtful, and it's disrespectful to the dead. On the other hand, these men have proven themselves nothing more than children. So when I heard JD Vance say it, it's like, 'Oh, good. Dumbass said something else'".
Banks deployed to Afghanistan in 2008, where he was part of a Canadian platoon that laid down cover fire for Americans under attack from the Taliban. To this day, he still has vivid memories of taking cover in a ditch near Pashmul, alongside an American platoon, looking up as the trees overhead were shredded by shrapnel.
He says he was proud to serve. But when he came home to Ontario in 2009, he felt something had changed. He began drinking heavily – sometimes as much as a litre of vodka a day – and struggling with suicidal thoughts. All hallmarks of PTSD. He received treatment, and now advocates for the mental health and wellbeing of other Canadian veterans. Still, a tinge of bitterness remains, when he thinks back on fighting on behalf of the US.
"I lost a part of myself," he says. "In that war we fought, for them."
***
Nancy Payne still remembers exactly where she was when she found out her son had died. Cpl Randy Payne served with a military police unit, stationed in Wainwright, Alberta. He was part of a specialised close protection team, charged with safeguarding high-ranking officers, government officials and other VIPs, in war zones.
On 22 April 2006, an armoured vehicle triggered a roadside bomb outside Kandahar airbase, killing Payne and three other Canadian soldiers. It was the deadliest attack on Canadian forces since 2002 – when four Canadian soldiers were killed by a US bomb after a disastrous friendly fire incident at the Tarnak Farms training facility in Afghanistan.
Nancy was at home, alone, when the phone rang in the dead of the night. It was her son's commanding officer. "When you get a call at three in the morning from Randy's boss, you know it's not good news," she recalls, speaking over the phone from her home in Lansdowne, Ontario. "I just kept saying 'Not my Randy … not my Randy'."
In 2025, the Royal Canadian Legion awarded Nancy a Silver Cross, a commendation for Canadian military mothers. She laid a wreath at the national war memorial during the Remembrance Day ceremony in Ottawa.
More locally, she has commemorated her son with a prize – "the Captain's Award" – bestowed to students who distinguish themselves in athletics and leadership at his former high school. She, too, is unnerved by the US attacks on the Canadian military and veterans like her son. "What they're saying is not right," she says. "We were neighbours for so long. That's all changed, now."
Nancy is not the only military mother who feels this way. Earlier this year, Jane McKay, mother of deceased Master Cpl Tim Wilson, penned an op-ed for the Toronto Sun newspaper taking aim at the Trump administration. "Trump has no respect for any soldier – American, or Canadian, or those from the Nato alliance," she wrote. "He owes them all an apology."
Some US politicians have tried to make amends. On 1 September, Arizona Democrat senator Rueben Gallego travelled to Ottawa on an official congressional trip. The goal was to strengthen the weakening trade relations between the two nations. But Gallego made a point of singling out Hegseth's anti-Canadian military tweets as "deeply disrespectful to the men and women of Canada that have died fighting with us".
For veterans like Chalmers, such lip service may be too little, too late. He used to play tabletop strategy games with a group of civilian friends in the US, via the online social platform Discord. That all ended when they laughed off his concerns about Trump's talk of Canada becoming the "51st state". Banks used to routinely take his family across the border for vacations and stateside shopping trips. No more. "I loved working with Americans, I loved training with them," he says. "But now it's hard to have that same level of empathy."
Would he eagerly enlist to help the US again?
"What would happen if there was another hypothetical 9/11?" he says. "I hate to say it, but why would any nation, ever again, partner with the United States, if this is how they treat their closest neighbour and ally?"

















