by francopoli

Despite the relatively friendly nature of the agreement, it nevertheless resulted in a fierce struggle for control of the Oregon Country in the following two decades. The British-chartered Hudson's Bay Company, having previously established a trading network centered on Fort Vancouver on the lower Columbia River, with other forts in what is now eastern Washington and Idaho as well as on the Oregon Coast and in Puget Sound, undertook a harsh campaign to restrict encroachment by U.S. fur traders to the area. By the 1830s, with pressure in the U.S. mounting to annex the region outright, the company undertook a deliberate policy to exterminate all fur-bearing animals from the Oregon Country, in order to both maximize its remaining profit and to delay the arrival of U.S. mountain men and settlers. The policy of discouraging settlement was undercut to some degree by the actions of John McLoughlin, Chief Factor of the Hudson's Bay Company at Fort Vancouver, who regularly provided relief and welcome to U.S. immigrants who had arrived at the post over the Oregon Trail.