This is one of the best all around sites that I have found. It is titled “The MacTutor History of Mathematics Archive.”
http://www-history.mcs.st-and.ac.uk/~history
This is an award-winning site that links to all sorts of mathematics information.
https://mathshistory.st-andrews.ac.uk/HistTopics/History_overview
This is an enrichment site on Babylonian mathematics.
https://mathshistory.st-andrews.ac.uk/HistTopics/category-babylonians/
This is an enrichment site on Egyptian mathematics.
https://mathshistory.st-andrews.ac.uk/HistTopics/category-egyptians
This is a very good historical site called Mathematicians of the African Diaspora.
http://www.math.buffalo.edu/mad/Ancient-Africa/mad_ancient_egypt.html