Prosperity, Are You Going My Way?

From publisher blurb: The Transcontinental Railroad surges westward into Dakota Territory, but constant raiding has halted its progress leading to Prosperity, a Black-founded town near Cheyenne established through negotiations with local Indigenous Nations. The bandits are well-armed and trained but why are they so obsessed with this tract of land? NOTE: This Bag of Nails (scenario) has no supernatural and is based in Haunted West’s alternate timeline.