Northwest Territories April 1, 1999, when the territory was subdivided to create Nunavut to the east, via the "Nunavut Act" and the "Nunavut Land Claims Agreement". While Nunavut is mostly Arctic tundra, the Northwest Territories has a slightly warmer climate and is both boreal forest (taiga), and tundra, and its most northern regions form part of the Canadian Arctic Archipelago. The Northwest Territories is bordered by Canada's two other territories, Nunavut to the east and Yukon to the west, and by the provinces of British Columbia, Alberta, and Saskatchewan to the south. The name is descriptive, adopted by the British government during
History of Yukon Rivers to the Yukon River. The southern route started at Fort Liard, Northwest Territories, then westward along the Liard River to Frances Lake and then along the Pelly River to its juncture with Yukon River. After establishing Fort McPherson, Northwest Territories, John Bell crossed the mountains into Yukon River watershed in 1845, and went down the Rat River (today the Bell River) to its confluence with the Porcupine River. After managing the fur trade at Fort McPherson, he returned to the Bell River, and followed the Porcupine to its juncture with Yukon River, the eventual site of Fort Yukon. Soon