In 1795, the treaty of greenville

Explanation:

The Treaty of Greenville was a treaty of "peace and friendship" between the U.S. and Native American tribes (northern territory). The Treaty of Greenville established a clear boundaries between the Native American lands and the lands open to white settlements. Allowed more settlers to move into region.

isaac newton first proposed that earth was not perfectly round. instead, he suggested it was an oblate spheroid—a sphere that is squashed at its poles and swollen at the equator.

the idea of the earth being a flat disc is also inconsistent with the fact that a given lunar eclipse is only visible from half of the earth at a time. the only shape that casts a round shadow no matter which direction it is pointed is a sphere, and the ancient greeks deduced that this must mean the earth is spherical.