The Blackfoot were known as one of the strongest and most aggressive military powers on the northwestern Plains. For a quarter of a century after 1806, they prevented British, French, and American traders from trapping in the rich countries of Missouri. At the same time they warred with their neighbor tribes, capturing horses and taking captives. One of the blackfoot's most sacred places was Alberta. Blackfoot Indians employed a method known as the buffalo jump, in which large herds of buffalo were chased on horses and driven off a cliff.
