All times in UTC ·
Dashed edge = started before, or continues beyond, this day
Events on Wednesday 17 September 1851 1
1851Treaty of Fort LaramieUS and Plains nations set tribal territorial boundariesSigned on 17 September 1851, the treaty between the United States government and numerous Plains Indian nations attempted to define tribal territories and secure safe passage for settlers along overland trails. Encroachment by settlers and miners led to its breakdown within a few years.