The treaty between Great Britain and the Russian Empire, signed on 28 February 1825, established the Anglo-Russian boundaries on the northwest coast of North America by demarcating Canada’s western boundary. Under its terms, the Russian Empire ceded to Great Britain what is now the Province of British Columbia, the Yukon, and part of the North-West Territories, while Great Britain ceded to the Russian Empire what is now the state of Alaska. The agreement resolved long international contention for maritime and territorial supremacy in the Pacific Northwest that had arisen from independent discoveries and explorations by Russians and Ukrainians, Spaniards, British, and Americans, as well as from the activities of overland fur traders from Eastern Canada. The sea otter, whose highly prized furs were the mainstay of the maritime fur trade in the North Pacific, was a significant factor in the mercantile disputes and subsequent boundary demarcation on the Northwest Coast. The signing of the 1825 boundary treaty extended Canada’s territorial limits from the Atlantic Ocean to the Pacific and the Arctic, and those limits have remained as such to this day.