Sioux dispersal upsets balance of power on the Plains (jan 1, 1820 – jan 1, 1850)
Description:
Sioux dispersal from the lower Missouri and introduction of horses upsets balance of power between settled and nomadic groups on the Upper Plains. Unmounted nomads and agriculturalists forced to consolidate into larger communities for defense, fostering the spread of disease.Added to timeline:
Date:
jan 1, 1820
jan 1, 1850
~ 30 years