Top 10 Important Events that Changed Canada 1750-1920 By ANNLLII Period: 1750 to 1920 Top 10 Events that Changed Canada Sep 3, 1783 Treaty of Paris Dec 26, 1791 Constitutional Act Jun 18, 1812 War of 1812 1837 Rebellions of 1837 and 1838 Feb 10, 1841 Union Act Apr 12, 1861 American Civil War Jul 1, 1867 Confederation 1876 Residential Schools 1881 The Canadian Pacific Railway Apr 9, 1917 Battle at Vimy Ridge