Africa Timeline By hmk080202 1441 Beginning of the Portuguese slave trade Period: 1464 to 1493 Reign of Sunni Ali Period: 1464 to 1591 Songhay Empire Period: 1506 to 1542 Reign of King Afonso I of Kongo Period: 1623 to 1663 Reign of Queen Nzinga of Ndongo 1706 Execution of Dona Beatriz Period: 1745 to 1797 Life of Olaudah Equiano Period: 1793 to 1804 Haitian revolution 1807 End of the British slave trade 1865 Abolition of slavery in the United States