Canada's External Relations By MaggieH. Period: Jan 1, 1860 to Jun 9, 2011 Canada's External Relations Jan 1, 1867 Canadian Confederation Jan 1, 1867 British North American Act Jan 1, 1899 South African War Jan 1, 1910 Naval Service Act Jan 1, 1914 World War I Jan 1, 1919 Paris Peace Conference Jan 1, 1919 League of Nations Jan 1, 1919 Treaty of Versaille Jan 1, 1939 World War II Jan 1, 1945 United Nations Jan 1, 1947 Agreement on Tariffs and Trade Jan 1, 1947 Cold War Jan 1, 1956 Suez Crisis Jan 1, 1974 Foreign Investment Review Agency Apr 17, 1982 Constitution Act Jan 1, 1989 NAFTA