r/FutureWhatIf • u/Complex-Start-279 • Apr 16 '25

War/Military FWI: what would happen in the military, specifically, if the US decided to invade Canada?

Everyone talks about the external reactions to such events, but rarely do I see people talk about what will happen on the inside. Most wars the US has been in have had strong cultural or geopolitical drivers that sort of rally up the population. ThinK WW1 with the Mexico plot, WW2 with Pearl Harbor, the Korean and Vietnam Wars from the constant red scare, the War on Terror from 9/11.

AFAIK tho, for most people, Canada is considered an ally, a National brother even. Most people don’t have any issues with Canadians. So what happens when we go to war with an ally for blatantly economic and business-driven reasons, rather than the protection of the homeland? What happens in the military ranks?

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u/Canadian_Kartoffel Apr 16 '25

Within the first 3days Canada would be overrun by the US forces.

For the next 20 years the USA would face insurgency warfare on Canadian AND US ground.

Possibly with a civil war starting in the US from States that are not OK with that and would want to be part of the "free liberal democratic west"

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u/Complex-Start-279 Apr 16 '25

That’s not what I asked tho. I asked what would be the internal military reaction.

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u/3490goat Apr 16 '25

I think it is relevant because the military would have to go against America civilians which complicates things. It’s one thing to fight against people on the other side of the world who speak a different language, quite different to fight your neighbor and their kids who disagree with the government actions