Atlantic Slave Trade Timeline

Bartolomé de las Casas renounced his encomienda and became a prominent critic of Spanish abuses against Indigenous peoples. Although his early proposals sometimes accepted African enslavement, his later work helped advance arguments about the humanity and rights of oppressed peoples.

Image source: Bartolomé de las Casas

Enslaved workers rebelled on the Caribbean island of Hispaniola in 1522, one of the earliest recorded African-led uprisings in the Americas. Such resistance took many forms, including revolt, flight, sabotage, work slowdowns, and the preservation of cultural traditions.

Enslaved people in South Carolina launched the Stono Rebellion, marching toward Spanish Florida and freedom. Colonial authorities suppressed the uprising and responded with harsher controls, including restrictions on movement, assembly, education, and African cultural practices.

Philadelphia Quakers formally disciplined members who participated in slavery and the slave trade. Quaker activism helped develop organized antislavery networks, petitions, schools, and arguments that influenced later abolition campaigns.

England's Court of King's Bench ruled that James Somerset could not be forcibly removed from England to be sold abroad. The judgment did not abolish slavery throughout the British Empire, but it became an important symbol and legal resource for abolitionists.

Image source: Somerset v Stewart

The American Revolution produced conflicting claims about liberty and slavery. Thousands of enslaved people sought freedom by joining British or American forces, while northern states began gradual emancipation and the plantation system remained powerful in the South.

Image source: American Revolution

British reformers including Thomas Clarkson and Granville Sharp founded the Society for Effecting the Abolition of the Slave Trade. The organization popularized evidence about the Middle Passage and coordinated petitions, lobbying, and consumer activism.

Image source: Society for Effecting the Abolition of the Slave Trade

Parliament's Dolben's Act imposed limits on the number of enslaved people British ships could carry and introduced modest requirements concerning crew and conditions. It regulated, rather than ended, the trade and exposed the political force of abolitionist campaigning.

Enslaved people in Saint-Domingue launched the Haitian Revolution, the most successful large-scale revolt against slavery in modern history. The revolution defeated colonial armies, abolished slavery in the territory, and created independent Haiti in 1804.

Image source: Haitian Revolution

Denmark became the first European colonial power to prohibit the transatlantic slave trade, although the ban was delayed until 1803. Danish colonies continued to rely on slavery, demonstrating the distinction between ending the trade and ending slavery itself.

Toussaint Louverture emerged as a central leader of the Haitian Revolution and governed much of Saint-Domingue. His leadership helped defeat foreign invasions and defend the emancipation proclaimed during the revolutionary crisis.

Image source: Toussaint Louverture

The French National Convention abolished slavery in French colonies during the French Revolution. The decree followed revolts and war in the Caribbean, but Napoleon restored slavery in 1802, making the first abolition temporary in most French colonies.

Image source: Abolitionism

The United States enacted legislation prohibiting the importation of enslaved people after January 1, 1808, the earliest date allowed by the Constitution. Illegal trafficking continued, while domestic slave breeding and interstate sales expanded.

Image source: Act Prohibiting Importation of Slaves

Britain's Slave Trade Act of 1807 made participation in the transatlantic slave trade illegal for British subjects. The Royal Navy later pursued suppression patrols, though British colonies continued slavery until emancipation in the 1830s.

Image source: Slave Trade Act 1807

Brazil declared independence from Portugal while preserving the country's plantation economy and slavery. Brazil continued receiving illegal slave ships for decades and became the last major American society to abolish slavery.

Image source: Independence of Brazil

The Slavery Abolition Act 1833 ended slavery in most British colonies, with an apprenticeship system delaying full freedom for many people until 1838. The act followed decades of resistance by enslaved people and organized abolitionist pressure.

Image source: Slavery Abolition Act 1833

Africans kidnapped for illegal transportation aboard La Amistad revolted and took control of the vessel. The United States Supreme Court ruled in 1841 that the captives were unlawfully enslaved and had the right to resist, leading to their release.

Image source: La Amistad

The French Second Republic abolished slavery in its colonies in 1848 after renewed abolitionist organizing and revolutionary upheaval. The decree freed hundreds of thousands of enslaved people in territories including Martinique, Guadeloupe, and French Guiana.

Brazil's Eusébio de Queirós Law prohibited the Atlantic importation of enslaved Africans. Enforcement sharply reduced new arrivals, but slavery inside Brazil continued through domestic sales, coercion, and plantation labor.

The American Civil War centered on the future of slavery and the Union. Enslaved people's flight, labor, intelligence, and military service profoundly shaped the conflict and turned emancipation into a central Union war aim.

Image source: American Civil War

Abraham Lincoln's Emancipation Proclamation declared enslaved people in rebellious Confederate areas free and authorized Black military enlistment. It transformed the war's political meaning, although it did not immediately apply to all enslaved people.

Image source: Emancipation Proclamation

The Thirteenth Amendment abolished slavery and involuntary servitude in the United States except as punishment for crime. Its ratification followed emancipation during the Civil War and created a constitutional foundation for challenging forced labor.

Image source: Thirteenth Amendment to the United States Constitution

Cuba completed the abolition of slavery in 1886 after the gradual emancipation of enslaved people and the end of the patronato apprenticeship system. Sugar production continued through exploitative labor arrangements after formal emancipation.

Image source: Slavery in Cuba

Brazil's Lei Áurea, or Golden Law, abolished slavery without compensation to slaveholders. Brazil became the last country in the Americas to end the institution, following sustained resistance by enslaved people, abolitionist campaigns, and military and political pressure.

Image source: Lei Áurea

During the eighteenth century, European merchants carried manufactured goods to Africa, captive Africans to the Americas, and plantation commodities to Europe. The pattern was not a single fixed route, but a broad commercial system that enriched port cities and plantation owners.

Image source: Triangular trade

The League of Nations adopted the Slavery Convention, defining slavery and committing states to suppress it. Although implementation was uneven and forced labor persisted, the convention established an important international framework against slavery.

The Universal Declaration of Human Rights proclaimed that no one shall be held in slavery or servitude. Its language connected the history of enslavement to a modern international human-rights framework.

Image source: Universal Declaration of Human Rights

UNESCO launched the Slave Route Project to research and publicize the history of the transatlantic slave trade, slavery, resistance, and their continuing consequences. The initiative emphasized African agency and the global nature of the system.

The 2001 Durban conference recognized slavery and the transatlantic slave trade as morally outrageous and significant sources of contemporary racism. Governments debated acknowledgment, responsibility, reparations, and the continuing effects of racial inequality.

UNESCO established August 23 as the International Day for the Remembrance of the Slave Trade and its Abolition. The date commemorates the beginning of the Haitian Revolution and encourages public education about resistance and emancipation.

The United Nations launched the International Decade for People of African Descent under the themes of recognition, justice, and development. It drew attention to the historical legacy of slavery, racial discrimination, and the rights of people of African descent.