In the 1920's, it was caused by high supply with low demand (low prices), high technological prices, the passage of Fordey-McCumber Act caused foreign markets to stop buying American agricultural products
Their land was taken over, as was their food source, making it hard for them to survive. They did not have the same rights as Americans either until 1924. They were forced to live on reservations.
The Lewis And Clark Expedition's goal was the explore the new land to the west. One of there other goals was the find a waterway that stretched from the east side of the US to the other side, also known as Sea to Shining Sea.
Explanation:
The Piedmont is a plateau region located in the Eastern United States. It is situated between the Atlantic coastal plain and the main Appalachian Mountains, stretching from New York in the north to central Alabama in the south.