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.

it's not the readmission

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