The Atlantic slave trade brought African slaves to the Americas from the 1600’s to the 1900’s, spurring the growth of slave use on plantations in the U.S., where the slave population reached 4 million...The Atlantic slave trade brought African slaves to the Americas from the 1600’s to the 1900’s, spurring the growth of slave use on plantations in the U.S., where the slave population reached 4 million before slavery was made illegal in 1863. In the United States, the most notorious instance of slavery is the Atlantic slave trade, through which African slaves were brought to work on plantations in the Caribbean Islands, Latin America, and the southern United States primarily.