sentences:  While some of this fur traffic was shifted to other routes in 1854, the forts, missions, Indian agencies, and remaining through traffic to Fort Garry kept the trails busy, and they were improved in the 1850s and supplemented by military roads.The West Plains Trail, although relatively level, went by a lengthy route through the lands of the Dakota people, and the shorter East Plains Trail also skirted Dakota land.The Dakota were the enemy of the Ojibwa, to whom the carters were related by blood and marriage.