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  First (Major) agreement post WW1
Protection of Pacific halibut fishery - 
  
  
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  Plan for mutual defense/army between Canada and US
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  Allows US to pass military aid to foreign countries during WW2
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  Agreement between US and Canada allowing the US and Britain to purchase war supplies from Canada
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  Canada does not approve of the war and lends no direct help to the US
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  US persuades Canada to form North American Air Defense Agreement (Signed 1958)
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  Trade agreement between Canada and US
Eliminated tariffs in the auto industry - 
  
  US and Canada sign an agreement to keep Lake Erie (And the other great lakes) clean and free of pollution (First GLW Agreement)
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  NAFTA comes into effect