I believe it was a trade route that was used commercially. Traders often used this route because it stretched so long and wide across the US.
Article V of the Constitution provides two ways to propose amendments to the document. Amendments may be proposed either by the Congress, through a joint resolution passed by a two-thirds vote, or by a convention called by Congress in response to applications from two-thirds of the state legislatures.
A two-thirds vote in both houses of the U.S. Congress. Ratified by three-fourths of the state legislatures.
A two-thirds vote in both houses of U.S. Congress. ...
A national constitutional convention called by two-thirds of the state legislatures.
The rights and the privileges of freedmen were still threatened after the civil war because laws were still made to regulate their activities. The black codes law were enacted which controlled the way a freed man can live; strict restrictions were placed on them, they can not vote, serve on jury, travel freely or engage in occupation of their choice.