I know, it's part of the ROC Canadian fantasies to see Quebecers to be humiliated militarily. The Canadian tanks in the streets of Montreal made bandaged many english canadian in 1970. The fact is that the seaway is under the federal government's responsibility now. it would only change hands. We will operate it to our advantage and in collaboration with American and you, Canadian, possibly, it depends .... That's being a sovereign Nation.It's not your Seaway. The Americans built, own it and they will take it away from you. The Seaway is their access to their Northern coastline where 50million people live. The Americans have been adament about maintaining their control over all of the sea lanes that are vital to them, everywhere on the planet and the St. Lawrence Seaway is very close to their homeland ... in it, in places.
This is what will happen an hour or two after you take "your" Seaway: The 10th Mountian Division in Watertown NY will take the Upper St Lawrence Valley perhaps as far south as Vercherres. US Marines will land all along your St. Lawrence shore. Old, St Laurent Quebec will henceforth be occupied, maybe annexed. The Aboriginal people of the North who have no histoic love of the French will go to the UN and get their independance, based on thousands of years of occupation. Your rump, little country will consist of the Kingdom of the Saguenay with people who truly and totally hate your guts on all of your borders. That ought to kill off the French language and culture in North America in no more than, say, two generations.
The Canada that picks up your lunch tab also protects your extremely fragile existance. You owe it to Alberta to help them with their exports.
Some sovereign Nations are going to impose their views on the territory of another Nation in defiance of his will and his safety. like, for example, impose the passage of a pipeline without compensation, violate election laws, impose anti-democratic rules, impose the passage of a seaway or give a huge portion of its territory to a British colony that wants to join there federation. I hope that as a sovereign nation, Quebec would never do such things.