Canada

We (Americans) also basically failed at nearly every single engagement that was an attempted incursion into British/Canadian territory or attack on a British fort/settlement west of the US proper, they were pretty much all either repulsed, or only initially successful for a short amount of time and then driven out.

I could be wrong, but I am willing to bet that many of those soldiers opposing the Americans involved in initial American incursions into Canada were British soldiers who lived in Canada, and/or were Native/First Nations allies of the British, and are thus proto-Canadians, unlike the Royal Navy and Marines who showed up in force within about a year, and were then withdrawn after the US basically sued for peace.

I agree that it's an oversimplification to view the entire war as just US vs a nascent Canada, but I also think it's an oversimplification to view the entire war as the US vs the UK.

Also I didn't state that Canadians burned down DC. I said that the last time the US fucked with Canada, the result was our capitol being burned down.

Sure, but The Geneva Convention is quite literally a list of things that The Canadians did in WWI that we collectively agreed was going a bit too far for war.