When the US troops cross the boarder we will just hand them a bong and a bag of weed and wait.
10 years will go by with a bunch of waisted soldiers either just hanging out eating poutine and beaver tails or occasionally shooting themselves in the foot.
After they admit this is a war that no one can win they will go back to the US and then pay us billions of dollars in compensation.

PS don’t forget Canada is not a sovereign nation we are part of the commonewealth. You pick on a Canada you are picking on UK, Australia, India and 50 other countries all owned by the Queen of England. Pick on one country you are picking on all the countries.