Why were treaties made with Native Americans and what was the impact of the treaty-making period?

Native Americans engaged in treaty negotiations to preserve and protect their people and the sacred landscapes that were their homelands. (please word this better)

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.

i dont know sorry why dont you looking it up on google