I dont know what there is to gain by adding Canada and Mexico- not really. I dont see ow it would enhance any of the 3. As to the 3 standing together if attacked- Ild think that was pretty much expected. If zxy invades Canada, the US would not just stand by. It gets fazzy with Mexico but still the US doesnt want an unfriendly force right on the door step.
The reasoning I have to assume is that Ruling one government is easier than trying to rule three seperate ones... From what I'm gathering is they want to first get nations into blocks like the European confederacy... Then they'll dominate them using fear making them willing to give up thier Liberties for security look what happened here after 911 now we have the Patriot Act... And if you're (The People) stupid enough to believe that 911 wasn't an inside job then you haven't been researching or you're unwilling to face the reality our nation is controlled by elitist thugs... What needs to happen is our Police & Military have to wake up & remember they are sworn to defend the Constitution & Our rights not the elitist's New World Order Agenda...