Canada's External Relations By loouuii Period: Jun 7, 1870 to Jun 7, 1871 Imperial Relations Mar 14, 1879 National Policy Aug 16, 1896 Klondike Gold Rush Jan 1, 1912 International Joint Commission Jul 28, 1914 World War I Jun 28, 1919 Treaty of Versailles Oct 1, 1920 League of Nations Sep 1, 1939 World War II Aug 18, 1940 Permanent Joint Board on Defense Jun 1, 1945 United Nations Begin Oct 20, 1947 General Agreemet on Tariffs and Trade Aug 1, 1957 North American Air Defence Agreement Jan 1, 1965 Canada-US Automotive Products Agreement Jan 1, 1973 Foreign Investment Review Agency Forms Apr 17, 1982 Constitution Act Jan 1, 1994 NAFTA North American Free Trade Agreement