sentences:  While the post was actually in Russian Alaska, the Hudson's Bay Company continued to trade there until expelled by the American traders in 1869, following the Alaska Purchase.A new trading post, Rampart House was established upstream along the Porcupine, but it also proved to be just inside Alaska's boundary.Gwich’in people, especially under the leadership of Sahneuti, played off the Hudson's Bay Company against American traders from the Alaska Commercial Company.