Inspired by Amadeus' post regrading 'interesting and boring' WI scenarios I offer The Canadian WI Challenge: to create a Canadian WI worth extrapolation.
Rule #1: It must be post-1900
Rule#2: It must be a Canadian initiated action/event. I.e. It can not be a Canadian reaction to a foreign power's action/event. ***
Rule #3: It has to be interesting.
*** Clarification: To say that Canada chose not to enter the Second World War would be acceptable, such an action would constitute a Canadian initiated action, you just can't have a foreign power take a direct action solely against Canada, that would be cheating. E.g. You can't say Great Britain tries to take back its colony, that would be a British initiated action and merely a Canadian reaction.
Good Luck!