It did not lead to the Civil War, what led to the civil war was the war of 1812. That was when U.S.A recognized that it needed to become stronger, and slaves were transported to the United States and put in the working class under bad conditions. Child labor and prejudice began there as well.
Arkansas,Oklahoma,Missouri,Kansas,Iowa. Most of Colorado, South Dakota Montana and Wyoming are also parts of the Louisiana Purchases. Some states also have a small part of the Louisiana Purchase like North Dakota, Minnesota,Texas, and Louisiana.
Hello, the answer to your question is U.S. Constitution, and the Magna Carta.
New York, Washington, Oklahoma, Nebraska, Ohio