How did the arrival of new settlers affect the Plains Indians?

president thomas jefferson commissioned the expedition shortly after the louisiana purchase in 1803 to explore and to map the newly acquired territory, to find a practical route across the western half of the continent, and to establish an american presence in this territory before britain and other european powers

d. japan's attack on pearl harbor

b.provides a written record of the transaction

b.

jim crow laws were enacted in northern states.