We are living in a pretty safe world when it comes to military intervention. Even Russia's occupation of Crimea was only to hasten that referendum and if it came down to physical conflict, Russia would lose more than gain. The same holds true for any ridiculous notion that he would jump on our soil.
The retribution would be swift and in our favour.
I assume you mean Canada when you say" we". Also in your last sentence you use "our" elastically perhaps. And what you mean by "world" escapes me entirely. My thinking as pertains the "world" (globe) is that virtually no corner of it has been safe from military intervention for the last century or more and the terms we and our are meaningless without qualifiers. I would not bet on Russia loosing anything to the remnants of western dominion. Times have changed and our former glories are rusting and crumbling under the wings of the infamous international community who"s directors and designers are even now lowering the life boats stuffed with the loot of decades of pillage.