The War of 1812 (which ended in 1814) is sometimes considered the last of America's attempts to annex territory that now belongs to Canada. 1814 isn't completely true. In fact, at the time of the Mexican annexation (1845), the US still had ambitions of taking land from Canada (which was still, at the time, a colony of Britain) by force of arms. In fact, it was the popularity of Democratic presidential candidate James K. Polk's "Fifty-four Forty or Fight!" expansionist agenda that won him the election of 1844. What was that all about? It was about taking territory from Canada by military force if necessary. They would have done it, too, except for the fact that the US had expended all its resources in a war against Mexico to annex (by force of arms) what is now California and Texas.
The region the United States threatened to take by force included Vancouver and Victoria Islands … today, the most prosperous regions of Canada.
Do not deceive yourself into believing the US has never launched an aggressive, unprovoked attack on another country. Self-deception is the worst of all lies—a lie we tell ourselves.
The greatest threats to Canada's sovereignty have always come from the United States and from its claim of "Manifest Destiny." Indeed, I believe the greatest success Canada has achieved during its existence has been averting annexation by the Americans.
Given US current ambitions of global military domination, and the threat by the current US President to annex Canada; I see no strong reason why Canadians should consider its own territory off limits to American conquest today.
Canadians: prepare for war, or for subjugation by force.
My opinion? Fight ... or submit. In my opinion, it's an easy choice to make. It was for me.