An occupation will. And the US has an extremely bad track record with occupations. That’s just a fact.

You go on counting troops and getting boners when warplanes fly over sports arenas, while Canadians are figuring out how many strategic targets in the US are within drone range. This wouldn’t be an overseas war where you just need to tell someone in uniform some bullshit “thank you for your service” remark and that would be your only exposure to it. It would be a guerilla war on the North American continent, and your dear leader is gutting the FBI’s counter intelligence capabilities.