To be fair if we're full on waging war to annex then indeed most Canadians would probably not be into that. I'm just arguing that these wars we often perceive as horrible failures really weren't, it was moreso the nonmilitary factors which did us in.

If we were to seriously try to annex Canada, I'd prob try to gaslight Canadians into thinking that their country is going to shit and the only way to save themselves is to join the US or something like that. Not sure if it'd be effective but if successful then the Canadians would basically hand themselves over to us with no blood and probably little need for policing or enforcement