Not enough info to go on. WHY did they invade? What caused the war? WHEN did they invade? Because for the last 200 years, there's been no reasonl to invade Canada from the US.
For my timeline, the POD is vast, but the basic timeline divergences are the French Republic surviving and stabilizing and no War of 1812.
French-American relations a much closer than OTL, and there is tension between Britain and America over Canada.
In what is essentially World War I, America joins the war on the side of the French, seeing the opportunity to conquer Canada (and British blockades of American ships heading toward France).
After winning such a conflict, my question arises: how would America handle Quebec? How would the French want America to treat Quebec? Would they want a independent Quebec under American control or French control? How much tension would this cause?
That is the background of information.