The first record of African slavery in Colonial America was made in 1619
Slavery in the United States was a form of unfree labor which existed as a legal institution on American soil before the founding of the United States in 1776
By the 1860 United States Census, the slave population in the United States had grown to four million
The Emanipation Proclamation
the passage of the Thirteenth Amendment to the United States Constitution in 1865
Barack Obama officially becomes the 44th president of the United States
