What happened to the US trading posts on the African Coast?

In January 1807, with a self-sustaining population of over four million enslaved people in the South, some Southern congressmen joined with the North in voting to abolish the African slave trade, an act that became effective January 1, 1808.

Explanation:

d.

many people believed they were convicted solely because they were anarchists.

i'm asking the same thing i asked this other cat all of