sentences:  The efforts of the Hudson's Bay Company to enforce its monopoly only induced the fur traders to avoid the company's jurisdiction by moving across the border to the United States.These included Norman Kittson whose enormous fur-trading and shipping enterprise along the West Plains Trail started with one six-cart train in 1844.In later years, trains consisting of hundreds of ox carts were sent from Kittson's post at Pembina, just inside U.S. territory and safely outside the reach of the Hudson's Bay Company.