Twentieth Century History Timeline By Riyadh Al-Hoyidy Jun 28, 1914 World War 1 Begins Apr 9, 1917 Battle Of Vimy Ridge Jun 28, 1919 Treaty of Versailles Is Signed Oct 29, 1929 Canada Great Depression Begins Sep 1, 1939 World War 2 Begins Mar 31, 1949 Newfoundland Joins Confederation Jun 25, 1950 Korean War Oct 16, 1962 Cuban Missile Crisis Feb 15, 1965 Canada Gets Its Own Flag Apr 17, 1982 Canada Constitution Is Patriated 1987 Meech Lake Accord