The history of Winnipeg comprises its initial population of Aboriginal peoples through its settlement by Europeans to the present day. The first forts were built on the future site of Winnipeg in the 1700s, followed by the Selkirk Settlement in 1812. Winnipeg was incorporated as a city in 1873 and experienced dramatic growth in the late 19th and early 20th centuries. Following the end of World War I, the city's importance as a commercial centre in Western Canada began to wane. Winnipeg and its suburbs experienced significant population growth after 1945, and the current City of Winnipeg was created by the unicity amalgamation in 1972.