And this is part of the reason why I'm so disappointed with what the dev team came up with. Because none of the above is true, but it's the impression that's been left by this civ design. Contrast with a lot of the ideas on the O Canada thread for what people perhaps weren't "expecting", but were certainly hoping for.
Only the RCMP get a bonus though, so I think you're good. Plus we can only march 2 hexes south, so that means the attack peters out somewhere around Bute.
Also, we need to give you a 5 turns heads up.