The primary Corps of Discovery contacts among North Dakota Native Peoples
were, of course, the Mandan and Hidatsa. However, they also made contact
with the Caddoan-speaking Arikara near the North Dakota-South Dakota border,
as well with a number of Dakota (Sioux) bands, notably the Yanktonai and
Lakota. In the decades after the expedition, Dakota power grew along the
Missouri and increasingly hedged in the Mandan and Hidatsa. By the middle
of the 19th century, Dakota power probably reached its peak with their
ascendency as the regions’ most powerful Native American group.
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