Answer:
Any map depiticting the evolution of slavery will tell the same story.
Slavery in the United States began in the Virginia Colony, when African Americans were brought in to work in tobacco plantations, after the indentured servant model had become less viable.
Slavery then expanded to lowland North and South Carolina, and then to Georgia.
After the United States became an independent nation, the Northern States were quick to abolish slavery, while the Southern States only became more reliant on slavery, and developed a lucrative domestic slave trade among them.
Slavery expanded form Georgia to Alabama, Mississippi, Texas, Arkansas and Missouri, until the Civil War erupted.
