Because the Northern States had already abolished slavery, and it was only the Southern States who were left to do so.
"European colonial powers established boundaries before vacating the lands" is the one among the following choices given in the question that shows how most <span>of the political boundaries of Africa were created. The correct option among all the options that are given in the question is the third option or the penultimate option. </span>
The fall of the Roman republic was mainly caused by the political instability.
