During the time of European settlement of North America there has been at least three attempts to invade Canada by Americans (or by British settlers in what was to become the United States of America). All three ended ignominiously. The first in 1690, part of the Anglo-French conflict known as King William’s War, was a naval expedition by the Massachusetts Bay Colony led by Sir William Phips with the objective of seizing Québec City, the capital of New France. The English bombardment of Québec was an abject failure and Phips’ expedition was forced to return to Boston in smallpox-infested ships on which hundreds perished on the journey [‘King William’s War 1688-1697’, Colonial Society of Massachusetts, www.colonialsociety.org]<ᵃ>.
1690 assault on Québec City from Massachusetts Bay colonists
The second invasion attempt was in 1775, during the early days of the American Revolutionary War. The idea to invade came from American army colonel (and later defector to the British side) Benedict Arnold, the rationale being to try to induce French Canadians to join the war for independence against their British rulers. The assault on Québec led by Arnold was easily repulsed by a reinforced British garrison and the American patriots reduced to 100 men were forced to retreat with their tails between their legs back to the American side [‘Battle of Québec: When Benedict Arnold Tried to Invade Canada’, Patrick J. Kiger, History, Upd. 29-Sep-2021, www.history.com].
The third occurrence was during the War of 1812, when the Americans invaded Canada, urged on by the “war hawks” in Congress who predicted it would an easy victory (in Thomas Jefferson’s words, “a mere matter of marching”)<ᵇ>.Despite making several invasion attempts, via both Upper and Lower Canada, the Americans again emerged empty-handed from their efforts (due to a combination of factors including inept US military leadership and woeful preparedness, and fierce resistance from the allied forces of British ‘Redcoats’ and First Nation warriors). In early 1813 the Vermont newspaper Green-Mountain Farmer lamented that the Canadian campaign had produced nothing but “disaster, defeat, disgrace, and ruin and death” [‘How U.S. Forces Failed to Conquer Canada 200 Years Ago’, Jesse Greenspan, History, Upd. 29-Aug-2018, www.history.com].
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In addition there have been other unsanctioned invasions from the US, such as the Patriot War of 1837-38, a series of disjointed raids from the US borderlands in support of the Canadian rebels (Rebellions of 1837). The Americans who participated, many from the Hunters’ Lodges, were motivated both by antagonisms against what they saw as British tyranny and by a sense of adventurism (Washington under Van Buren maintained a policy of neutrality during this episode to safeguard its trade interests with Britain).
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After the American Civil War Irish-American Republicans from the Fenian Brotherhood crossed the border, raiding British military strongholds in both the west and east of Canada as part of a stratagem to force the British into negotiation for Irish independence…the most notable of these engagements was the Battle of Ridgeway (1866) in which the Fenians were victorious over inexperienced Canadian volunteers. For the Fenian militia it was a pyrrhic victory, serving only to a spur for the realisation of Canadian confederation rather than to advance the cause of Irish independence<ᶜ> . [‘An Irishman’s Diary on the Battle of Ridgeway, the Fenian Invasion of Canada in 1866’, Brendan Ô Cathaoir, The Irish Times, 01-Jun-2016, www.irishtimes.com].
And when Americans weren’t engaged in the process of actually invading Canada, they were often scheming and planning to annex their northern neighbour. One of the more bizarre instances of this was “War Plan Red”, this 1930 US plan to invade Canada was, unlike earlier ones, supposedly a scheme to get in first! The US military’s predessors to the Pentagon feared that Britain in the years following WWI might launch an invasion of the US from Canada. Canadians in fact had already preempted the US with the military coming up with its own “Defender Scheme No. 1”, a five-pronged attack plan to invade the US (the idea was that Canada would make the initial (surprise) strike on key American cities and then rely on Britain and it’s other dominions to follow up the invasion). Fortunately, nothing came of either of these plans and they were quietly shelved by the time North Americans managed to crystallise in their minds who the real enemy was (Nazi Germany) [‘The Time the U.S. Almost Went to War With Canada’, Kevin Lippert, Politico Magazine, 21-Jun-2018, www.politico.com].
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Another odd manifestation of the tendency toward annexation came from north of the 49th Parallel in the 1840s. In 1846 Britain repealed the Corn Laws<ᵈ> ending preferential colonial trade which provoked a merchant revolt in Canada. Conservative Anglophone businessmen were fearful that without protection for their produce the Canadian economy might plummet into recession, some of them rioted, burning down the new parliament building in Montreal. 325 of the Tory businessmen, convinced that republican system of the United States would be more profitable to them, signed a document known as the Montreal Annexation Manifesto (1849), calling for the US to annex Canada. This of course never came to reality but the movement’s primary objective, reciprocal free trade with the US and access to its market, was ultimately realised with the Elgin-Marcy (Reciprocity) Treaty in 1854…by which Canadian lumber and wheat entered the US duty-free, in exchange the Americans were given fishing rights off Canada’s Atlantic coast.
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<ᵃ> an unexpected consequence of Phips’ disastrous Québec adventure was Massachusetts’ introduction of the first government-backed paper currency in the American colonies, necessary to pay the near-mutinous troops, promised a share of the loot from Québec’s capture [Goldberg, Dror. “The Massachusetts Paper Money of 1690.” The Journal of Economic History 69, no. 4 (2009): 1092–1106. http://www.jstororg/stable/25654034.]
<ᵇ> once again the American invaders made the error of thinking they would be received as liberators in Canada
<ᶜ> curiously, in this same year (1866) a bill—designed to appeal to American Fenians—was introduced into the US Congress to formally annex “British North America”, but it never passed the House of Reps
<ᵈ> the ‘corn’ laws in the UK encompassed all cereal grain crops