When and where did slavery exist in the world prior to slavery starting in africa ?

In the 7th century to 20th century, Arab Muslims and Europeans raided Africa and traded on Africans. In this period, a lot of Africans were sent to North Africa, America, and parts of Asian countries.

it was a act of seld fesnse more over it was a peace treaty between the fogein contunries.

eroupe is a great mideval place and alot of wars went on alao