The Arikara attack a group of seventy…
June 1823 CE
The trappers are camped near an Arikara village at the mouth of Grand River (north of present-day Mobridge, South Dakota).
Fourteen trappers die and ten are were wounded, including Hugh Glass, memorialized in the 1954 biographical novel "Lord Grizzly" by Frederick Manfred (see also The Revenant, which is loosely based on Hugh Glass).