1615: French explorer Samuel de Champlain establishes the first European settlement in Ontario at Huronia.
1763: The Treaty of Paris ends the Seven Years' War and Ontario becomes a British colony.
1791: The Constitutional Act divides Ontario into Upper Canada and Lower Canada.
1812-1814: The War of 1812 between Britain and the United States takes place, with several battles fought in Ontario.
1867: The British North America Act creates the Dominion of Canada with Ontario as one of the founding provinces.
1914-1918: Ontario contributes significantly to Canada's war effort in World War I.
1939-1945: Ontario again plays a vital role in World War II, producing war materials and hosting military bases.
1951: The city of Toronto becomes the largest city in Canada, surpassing Montreal.
1967: Ontario celebrates the Canadian Centennial with the opening of Ontario Place, a major tourist attraction.
1982: The Constitution Act patriates the Canadian constitution and Ontario gains more control over its own affairs.
1995: The Common Sense Revolution led by Mike Harris's Progressive Conservatives wins the provincial election and implements significant reforms, including cuts to social programs and public sector jobs.
2003: Ontario undergoes a severe acute respiratory syndrome (SARS) outbreak, centered in Toronto, leading to significant health and economic impacts.
2010: The G20 summit is held in Toronto, drawing world leaders and highlighting the city's global importance.
2018: Cannabis is legalized in Canada, and Ontario establishes a legal framework for its recreational use.
Throughout its history, Ontario has experienced growth, diversity, and transformation. These events have left lasting impacts on the province, shaping its present character and influencing its future trajectory.
