https://10millionnames.org/

Quoting from the Project website:

10 Million Names is a collaborative project dedicated to recovering the names of the estimated 10 million men, women, and children of African descent who were enslaved in pre- and post-colonial America (specifically, the territory that would become the United States) between the 1500s and 1865.

The project seeks to amplify the voices of people who have been telling their family stories for centuries, connect researchers and data partners with people seeking answers to family history questions, and expand access to data, resources, and information about enslaved African Americans.

This is an ongoing project and will likely be in the news for an extended time. You can see some of my recent videos about African American research as follows:

The Great African American Migration 

Part One: The Great Northward Migration 1915-1970 Overview and Methodology for Beginning Research

There are five more videos on the RootsTech.org website.