You are underestimating the power of modern propaganda, especially now that AI is in the mix. Custom reality for anyone.

As a finn, not sure I would call it a lost war to keep independence against an enemy that has superior manpower and resources at their disposal in comparison.

And half is not even close to the truth.

Not to disrespect the amazing achievements of the Finn’s in that war, but they lost, and lost half their country.

In actual reality, we lost 9% of our territory to USSR due to WW2. One city, two towns. By official sources, about 400 000 Finns evacuated the conquered territory, and about 20 people remained and became Soviet citizens.

The Americans who will actually follow the orders will come from red states though. I know Alaska is red but I don't think those people are the invade Canada type

the reality is that americans will do just fine with the winter.

the part that will destroy them, is trying to manage an occupation of a country on its own border. where the population is almost indistinguishable and hidden, Just like Russia deals with in Ukraine. the Americans didnt have the stomach for an occupation on the other side of the world where the culture was so different they might as well have been aliens, they lost to that. They would have even less so for one on their own border where the "enemy" is attacking them from within.

the enemy, being both Insurgents from Canada, as well as their own population. Attacking Canada will absolutely, 100% cause a Civil war in America, Even US military bases could start shooting at themselves as units fight it out for a prevailing loyality once there's a constitutional and moral crisis in america.

And the Adminstration would end up going into Putin Bunker mode. if they aren't deposed or eliminated right away by a Coup.