what are important events in canadian history?
['4 August 1914: Canada at War. ... ', '22 August 1914: War Measures Act. ... ', '22 April 1915: Battle of Second Ypres. ... ', '1 July 1916: Beaumont Hamel. ... ', '9 to 12 April 1917: Battle of Vimy Ridge. ... ', '20 September 1917: Wartime Elections Act. ... ', '26 October to 10 November 1917: Battle of Passchendaele. ... ', '17 December 1917: Federal Election.']