If I can add my humble contribution to this question.
I’d would say that most “african nation-states” that we see today were unexisting at that time. So, trying to go by the country lineage seem biaised.
A nation-state born from 1 - An ideology that people sharing a common interest, culture, language (mostly by imposing a language majority) etc… 2 - An arbitrary territory. By thus we obtain a nation. Which is rathed a mosaic of different people stuck together.
In “africa” people living in the nation-states think themselve as nation/tribe within in the nation subdivised in clan e.g main tribe/sub-tribes.
You are correct that these nation states did not exist at the time. At that time there were just regions or areas. And then these regions were comprised of tribes and villages. Nation states did not exist until Europeans decided to colonize Africa.
Most of my students are African Americans and will gain greater insight about their
history. It will help them to become more prideful and increase their sense of self worth.
Many times they want to learn about their contributions to the history of the United States
and the world in which we live, but do not have the resources in which to find out this
information.Thank you @humanearl and everyone for the answers. Its very much appreciated.