1856

Both posts established by Lajeunesse and Archambault near are abandoned amid declining trade and rising tensions with Native groups.
September 1856: Archambault attempts to reoccupy his post; Sioux warriors drive him off, leaving an arrow in the door as a warning.
October 1856: A late-starting Mormon handcart company under Edward Martin finds Devil’s Gate deserted and burns part of the old post for warmth, sheltering nearby at what becomes known as Martin’s Cove.