Since other countries will be forced to physically invade Canada and since we won't have that dilemma Canada could build nukes, hydrogen bombs, chemical weapons, etc and launch them at the invaders decimating their government (no leaders), civilian population (no more recruits for military), factories (nothing to make guns), as well as everything else in their country. 

 Why would they be forced to physically invade?

Even though Canada does not have nuclear missiles we have nuclear capability

what does this even mean?

You do realize 90% of Canada is not habitable ?

Your path to victory is through nuking every single other country out of existence? Sounds like you've thought this through. I salute you, my new Canadian overlord.

Sun Tzu once wrote, "BOMB THOSE MOTHER FUCKERS. DROWN THEM IN DEATH."

 Canada has JTF-2 which is one of the best spec ops groups in the world

 So per say Canada does not get bombed (because nukes are not the only bombs around) , you think there spec ops group plus the population of that 10% witch is habitable can fight off an entire military invading ?  

Seems a bit illogical. 

If the USA gets bombarded with nukes do you think Canada will have some sort of magical shield around its borders, preventing radiation and firestorms from forming lol?

I heard a joke once related to who would win WW III.

There is a group high ranking generals and states men eating dinner discussing who would win WW III should it happen. A corporal walks in carry a tray with  the next course for the meal. For laughs a general asks the corporal." Who do you think would  win WW III?  The Corporal looked the general dead in the eye and seriously stated,

" Sir, I have no idea who will win, but in WW IV we will be fighting with rocks."

AMERICA FUCK YEAH!!!!!!!!!!!!

All that needs to be said 

Bakteriologilikistan

coz they have the biggest dick! GOGO!

cockroaches

Canada at most, would play a minor role if a hypothetical WW3 were to occur. You need to realize if there is going to be a WW3, it is going to be a major Cyber-Warfare kind of engagement. It will be totally unprecedented to human kind.. Let's just hope the good guys win.

Think it will be probably Russia or China! They are to secretive to themselves unlike USA and seem to be working on something.

Dolphins.

They'll be the leaders of the next cycle.

America would win one reason gamer controlled robots done boom send a robot controlled bt the worlds best gamers and boom your all dead ha ha ha  also if I was leading the charge we would not lose id be like send in the robots to sector 12

cockroaches/Dolphin

Funny how you say that. Maybe aquatic terrain protects from the Nuclear residuals. 

But outside of that. 

BACTERIA wins! 

Sorry mate, you really have no idea how long it takes to build a bomb do you? All those bombs you speak of the US has it already. As does Russia, North Korea, Iran, India, and a shit ton of other countries around the globe. By the time you get the parts for the first bomb, your government is already dead. 

Btw mate, 

The United States and the above named countries, do not need Nukes to decimate you. We dont even need an aircraft to decimate Canada. 

In other words man, your arguement is nullified by the fact that you clearly have:

1. No flipping clue what your talking about

2. In this day and age, their is no telling who would side with who, if World War 3 started tomorrow

And finally i saved the best reason for last...

If a Nuclear war started, the world as we know it would end. This planet would not be habitable for atleast a century, if not longer. everybody would be dead. So noone would give 2 shits about the resources you have in Canada.

If you dont die by the blast, you will die a slow painful death by radiation poisoning, among other things.

So here is my answer, Nobody wins.