In the last one hundred years, the geo-politics of the world has changed significantly. In the next one hundred years, geo-politics will change again.
I disagree with Michael Dorosh that countries or people in general have advanced beyond the application of military might or the desire to control.
Europe, particularily France, Germany, Britian, and Spain, and the reactions of eastern Europe have recently shown the individual/collective
co-operation and friction. Europe has always been resource dependant and has looked elsewhere in the world for opportunities. Its part of their history. You will notice the histories of the USA, emergent China, and Russia and where these countries are placing their interests. I‘ve taken trips to both Europe and China and opinions of ordinary people there are much different from ours.
Certainly Europe will seek a more dominant role in the world economically and politically. The creation of the Euroforce suggests militarily or the ability to act in the future. It will squeeze the US, intertwine with Russia, and watch China. European and US foreign policy is not congruent.
Without a scenario, its difficult to seek how or why Europe in the next two decades would attack Canada or the US. Given international trade and foreign ownership, they‘d have the ability to screw up the North American economies making a hard military venture pointless anyway.
NORAD and defense co-operation with the USA makes Canada a distastful country to attack. A land invasion is certainly a vast undertaking especially in winter. Water, oil, and natural resources here are not so important to make an attack imminent. NORAD would be successful against a large attacking force. The application of nukes around the world would make it all pointless.
If an attack came, it would be an economic disruption
made to be subtle against North America. Drag down the economies, reduce military spending and development, tie up forces in the rest of the world by causing instability, and then gather control over North American politics.
Or made quickly by taking out or controlling command and control. Interesting that Europe thru NATO has a good understanding of North American defense and how the US manages its military in war.
Thats IT!! I‘m throwing out all my Tom Clancy books. Probably printed with delicious sugar coated just baked smell of Tim Hortons money.
MMmmmmmm... donuts.