ac's exist for the purpose of bullying weaker nations so you can exploit them. and justifying giving trillions of dollars to your military for precisely that reason current missile technology now makes a multi billion dollar floating offense castle an extremely foolish investment, a la giant battleships in ww2.  a bunch of them are going to go to the bottom of the ocean in the next few years, and let's hope all the bullies don't blow their nuclear loads in retaliation for the shameful blood letting.
Canada