“Next to a map of the United States describing "patterns of immigration," it read that the Atlantic slave trade brought ‘millions of workers from Africa to the southern United States to work on agricultural plantations.’”
They erased slavery. This is by intent.
@feloneouscat Exactly! I'm now reading 'The !619 Project'. No wonder the racists want to revise history. George Carlin called it 'soft language'.
https://www.thoughtco.com/soft-language-euphemism-1692111