1. Ancient Civilizations:
- Ancient Egypt
- Ancient Greece
- Ancient Rome
- Mesopotamia
- China
2. Transatlantic Slave Trade:
- Western Africa
- Caribbean Islands
- North and South America
- Europe (limited involvement)
3. The Arab Slave Trade:
- Eastern Africa
- Middle East
- North Africa
- Arabian Peninsula
4. Indian Ocean Slave Trade:
- Southeast Asia
- India
- East Africa
- Madagascar
5. Slavery in the Americas:
- United States
- Brazil
- Cuba
- Haiti
- Dominican Republic
6. Slavery in Africa:
- Various regions of Africa, including West Africa, Central Africa, and Southern Africa.
7. Slavery in Europe:
- Eastern Europe (especially in the Ottoman Empire)
- Southeastern Europe
- Limited involvement in the transatlantic slave trade
8. Slavery in the Indian Subcontinent:
- India (especially under Mughal rule)
It's important to note that this list is not exhaustive, and slavery has occurred in many other regions of the world at different points in history. The abolition of slavery has been a gradual process, with significant progress made in the 18th and 19th centuries, but some forms of slavery still persist today in certain parts of the world.