Smallpox decimates tribes - survivors join together (12 jan 1837 ano – 24 nov 1838 ano)
Descrição:
 A smallpox epidemic destroys the Numakiki Indians in North Dakota. The one in 1838 is so severe that only 130 out of 10,000 people survive. The Numakiki join with other survivors among the Sahnish (Arikara) and Minitari (Hidatsa) peoples. 
Adicionado na linha do tempo:
Data:
12 jan 1837 ano
24 nov 1838 ano
 ~ 1 years and 10 months