Winnipeg of Métis, led by Louis Riel, and newcomers from eastern Canada. General Garnet Wolseley was sent to put down the uprising. The Manitoba Act of 1870 made Manitoba the fifth province of the three-year-old Canadian Confederation. Treaty 1, which encompassed the city and much of the surrounding area, was signed on 3 August 1871 by representatives of the Crown and local Indigenous groups, comprising the Brokenhead Ojibway, Sagkeeng, Long Plain, Peguis, Roseau River Anishinabe, Sandy Bay and Swan Lake communities. On 8 November 1873, Winnipeg was incorporated as a city, with the Selkirk settlement as its nucleus. Métis legislator and
Winnipeg of the Red River Valley, a flood plain with an extremely flat topography. It is on the eastern edge of the Canadian Prairies in Western Canada and is known as the "Gateway to the West". Winnipeg is bordered by tallgrass prairie to the west and south and the aspen parkland to the northeast, although most of the native prairie grasses have been removed for agriculture and urbanization. It is relatively close to many large Canadian Shield lakes and parks, as well as Lake Winnipeg (the Earth's 11th largest freshwater lake). Winnipeg has North America's largest extant mature urban elm forest.