They'll be aiming to crush Canada economically until Albertans are sure they want to go it alone. Then they can start physically dismantling the country, starting with Alberta, and intensifying the economic pressure on the rest until Canada submits to de facto US rule. They can formalize it later with humilitating treaties and guns.

Canada needs to work quickly on economic and military independence. Our whole international position needs to change before the USA really gets going with the program. And Canada needs to figure out how to make it very painful for the USA if it attempts anything. If ever the USA invades, we need to already be there inside their country, physically and virtually, making life hard for them in surprising ways. And we need to build up alliances until they're so strong that it becomes uncomfortable for our allies to flake out and go along with the USA.