were sent to the fort when a dispute erupted with the United States over the boundary between the Oregon Territory and what is now British Columbia. However, some believe the request for troops was actually intended to intimidate local free traders (as trading with anyone other than the HBC was illegal). In either case, by the time the troops arrived (1846), the threat of invasion was long over. The troops (becoming a nuisance by causing minor disturbances) were put to work at the fort completing the construction of the walls which were finished in 1848. Mid 19th century (1851–1884) The fort became an industrial centre by the 1860s and included several buildings, such as a flour mill, sawmill, forge, and a brewery. When the Red River Rebellion broke out in 1870, Louis Riel occupied Upper Fort Garry, and the Quebec Rifles took the lower fort. No wars or fights ever occurred at Lower Fort Garry as it was a peaceful settlement. On August 3, 1871, the first treaty in Western Canada was established between the federal government and seven chiefs of the Ojibway (Saulteaux) and Swampy Cree First Nations at Lower Fort Garry. Indian Treaty No. 1 transferred the land that now comprises part of modern Manitoba. The treaty's intent was to ensure the peaceful settlement of the prairies by European immigrants, while providing First Nations people with land, access to resources and other necessities for their survival. Almost immediately after the treaty was established, the two parties disagreed on its meaning. Indian Treaty No. 1, the precedent for the 10 subsequent numbered treaties in Western Canada, is commemorated by a Historic Sites and Monuments Board of Canada plaque outside the Visitor Reception Centre. Training of North-West Mounted Police members took place at the fort in the winter of 1873–1874. Many of the North-West Mounted Police of 1873–74 had been there already during the rebellion in 1870, including Inspector James F. MacLeod, who had met his fiancée, Mary Drever, at Lower Fort Garry on the previous trip. The first contingent of Mounties arrived in Lower Fort Garry on October 22, 1873, and on November 3 they were sworn in and commenced training. The bitter winter was spent drilling and learning to ride. The parade ground was frozen as hard as concrete, and was pretty unforgiving when a recruit was unexpectedly pitched from his horse. By the following June they were