What happened to the mandan village after the lewis and clark expedition? a. a fort was established and many were killed by disease. b. they left the village and moved farther west. c. they were invaded by american soldiers. d. they prospered due to trade with the americans at the fort.

A) A fort was established and many were killed by diseases

 Lewis and Clark's expedition was not positive to the native of Mandan village the most devastating epidemic was the smallpox outbreak in the year 1837 killing a lot of people. The epidemic played an important factor in uniting the surviving Mandans and Hidatsa who later engaged in trade, farming and hunting.  

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