https://www.mtholyoke.edu/~sulli20c/classweb/Portugese_Entering_the_Kongo.html - From a series of articles about the Portuguese involvement in the Kingdom of Kongo, this source focuses on the religious influences of the Portuguese and the contemporary debate over whether the Kongo people were largely Orthodox or Catholic.
https://www.rmg.co.uk/discover/explore/transatlantic-slave-trade-and-abolition - This article from Royal Museums Greenwich is a summary of the Atlantic Slave trade that focalizes the later period of the trade, at its height. It extends to the end of the slave trade, the uprisings in Haiti, and other nations that were largely slave-based.
https://www.youtube.com/watch?v=0IJrhQE6DZk – This video, from The History Channel’s Roots Series, describes and provides an inside look into the horrors of the Middle Passage, the voyage from Africa to America.
https://www.youtube.com/watch?v=3NXC4Q_4JVg – TED-Ed video about the workings of the Atlantic slave trade, how it was justified at the time, and how its impact has reverberated throughout history.