Defining Modern Canada By methuzalemm.1 Jan 1, 1870 Withdrawal of British garrisons from central Canada Period: Jan 1, 1870 to Jan 1, 1999 Canada's External Relations Jan 1, 1910 Naval Service Act Apr 1, 1917 Resolution IX was passed Jan 1, 1919 Canada's relationship with the League of Nations Jan 1, 1921 Meighen represented Canada at the Imperial Conference Mar 1, 1923 Halibut Treaty was signed by Canada Dec 11, 1931 Statute of Westminister Jan 1, 1949 North Atlantic Treaty Jan 1, 1951 Canadian military units were sent to Europe Jan 1, 1956 Canada's proposal of an international peacekeeping force Jan 1, 1963 North American Air Defence Command Jan 1, 1965 Canada-US Automotive Products Agreement Jan 1, 1989 Free Trade Agreement Jan 1, 1990 Canada joined the Organization of American States Jan 1, 1993 Trade missions in Asia and Latin America