Canada's Timeline with Attitude By alice.zaric Aug 4, 1914 Canada joins WWI* 0 Apr 12, 1917 Battle of Vimy Ridge* +2 May 18, 1917 Conscription Becomes Law* -1 Dec 6, 1917 Halifax Explosion^* -2 Nov 9, 1918 Post WWI debt $ -1 1920 Canada's Group Of Seven^ +1 1920 Indian Act* -2 Jan 23, 1922 Discovery of Insulin $ +2 Jul 1, 1923 Chinese Immigration Act* -2 Oct 18, 1929 Women are Declared 'Persons'^ +2
