West Africa was the primary source of slaves for the transatlantic slave trade, with an estimated 12 million people enslaved and shipped to the Americas.

The transatlantic slave trade began in the 15th century with the Portuguese slave trade along the coast of West Africa.

Slavery in Africa was used for a variety of purposes, including agriculture, mining, domestic service, and other forms of forced labor.

England was the first European country to abolish slavery, with the Slavery Abolition Act of 1833.

The Underground Railroad, the American Anti-Slavery Society, and the National Negro Convention were all part of the abolitionist movement in the United States.

Slavery was finally abolished in the United States with the ratification of the Thirteenth Amendment to the Constitution in 1865.

Frederick Douglass, Harriet Tubman, and Sojourner Truth were all African American leaders who escaped slavery and became leading abolitionists.

Frederick Douglass's book, 'Narrative of the Life of Frederick Douglass, an American Slave', was published in 1845 and became a powerful indictment of slavery.

The Fugitive Slave Act of 1850 was a law that allowed for the capture and return of escaped slaves, even in states where slavery had been abolished.

The American Civil War was fought from 1861 to 1865 over the issue of slavery in the United States.

Ghana was the first African country to gain independence from colonial rule, in 1957.

Kwame Nkrumah was the African leader who led Ghana to independence in 1957.

Pan-Africanism, African Nationalism, and Negritude were all movements that sought to unite African countries and promote African unity.

Nelson Mandela, Oliver Tambo, and Walter Sisulu were all African leaders who led the fight against apartheid in South Africa.

Apartheid finally ended in South Africa in 1990.