sentences:  Pembina had been a fur-trading post since the last decade of the eighteenth century.From there, some traffic continued south along the river, but most cart trains went west along the Pembina River to St. Joseph near the border and then south, or else cut the corner to the southwest in order to intercept the southbound trail from St. Joseph.This north-south trail paralleled the Red River about thirty miles (50 km) to the west.