Where did the surgeon that owned Dred
Scott move to in the 1830s and 1840s?

St. Louis, Missouri

Explanation:

His original owner, Peter Blow, moved to Alabama in 1818 and then relocated to St. Louis, Missouri, in 1830, taking with him his property—including his slaves—as he moved west. Blow died in 1832, and Dr. John Emerson, an army surgeon, purchased Scott.

Hope this helps! :)

treaties

explanation:

disease was the number one killer of native peoples. they had had little exposure to the diseases of europe. this led to some villages being almost completely wiped out and some tribes destroyed.