Ogre Invasions in real life.

Hello I'm new to this forum I joined because this looks like a cool place and Ogres are bad ass, and I was curios about an Idea I had, there are no doubt many Ogre experts here so I figured this was the best place to ask, an army of a few thousand ogres descends into the United States from somewhere in northern Canada around 1850? would the nation be able to survive?

1850 saw good devolpmemt in hand rifles and cannon weaponry. If we leave magic aside here's how it would go:
Ogres would plough along, get riddled with hullets and cannon shells, eat many towns, push back to Canada, drink mayple syrup all day and then do business with humanity.
As for their beasts, they might be harder to kill, but WFB doesn't do a lot of "Pre-Battle events". For all we know, the opponent's army might actually be the survivors of a previous engagement, maybe the only ones who got across the destroyed bridge by the valley, who avoided the assassination group in the mountains.
Bring in magic, and things get a lot harder. In an all out war, men, women and children fighting for their lives, humanity might eek out a win, if America does fall at the cost.

I didn't notice this article upon its first passing...

Brainfreezer makes a good point, it's hard to imagine magic in our world, and so a major advantage that most WH armies have against Ogres is lost there immediately.

Even imagining the invasion, it would drastically change American history; it would be right before the Civil War erupts, so it could change the outcome (or even maybe prevent it from happening, if the nation is too busy fighting for survival). Assuming that the fledgling nation could survive the attack, with the original scenario presented of the Ogres invading from the Canadian territories, it would easily devastate most of the northern lands before they were pushed back, which would weaken the North and possibly have given the Confederacy an advantage once they defected. (Who knows, maybe even a Confederate conspiracy could have provoked the Ogres into invading, thus weakening the North for a hostile takeover?)

Now, are the Ogres actually one mass army, sent down specifically to attack the US? Or is it more like a grand Ogre exodus/invasion of many tribes, running amok amongst the mainlands of continental America?

Let's also look at the fact that if the Ogres were coming down to invade, they'd also be probably attacking French colonies, as well as having to face field battles with the few free Native American nations left; I think the horseback tribes could easily keep the Ogres at bay, by kiting them effectively. The tribes that fought more in the forests by hand, however... probably would not be quite as successful.  Perhaps, some of the tribes would make alliances with the United States (as well as the French) to train and prepare all the humans to be able to fight the monstrosities. Ogres are too blunt, and could easily be led through a forest into a deathtrap if they don't have a proper Tyrant to knock their heads about a bit!

I dunno. This is a fun exercise. And if the Americas had magic available to them, what would they use to stop these Ogres?

A very interesting event you have preposed Jadows. I'm completing a college course about the Civil War so I'll have to wait a bit before I can give a serious answer.

However, my opinion would be that when the war breaks out you would see ogres fighting on both sides of the conflict. They might even turn the tide of the war in the South's favor by preventing certain battles from being lost. Just by keeping Stonewall Jackson alive would in itself cause the battle of Gettysburg to most likely become a Confederate victory and then create a snowball effect that would cause the North to lose the war.

Now I will forever picture Jackson at Gettysburg with hired Ogres charging into the Union battle lines.