What event opened the northwest territory to american expansion?
a. the treaty of greenville
b. the treaty of paris
c. the battle of the fallen timbers
d. the defeat of general arthur st. clair

The correct answer is:

A. the treaty of Greenville.

The Treaty of Greenville (1795), between the United States and Indians of the Northwest Territory, was intended to redefine the limits between Indian lands and Whiteman's lands. This treaty led the way for American westward expansion. However, in the process, the Native Americans lost much of their land and lasting peace was not actually achieved.