Which was a barrier to westward expansion in the late 1700s

The Appalachian Mountains

Explanation:

The Appalachians were a barrier to the westward expansion. It runs from southeastern Canada to central Alabama and was the physical boundary that prevented the westward settlement. The government-sponsored Daniel Boone to navigate a path to the rich lands beyond the mountains. After that, they were able to reach a path through the Cumberland Gap, that ran for 800 miles from Cumberland, Maryland to Vandalia Illinois.

thing is, i'm afraid, you can't.

the most you can do is log out and never log in again.