In the 13th and 14th centuries, it was Christian pirates, primarily from Catalonia and Sicily, that dominated the seas, posing a constant threat to merchants. It was not until the expansion of the Ottoman Empire in the 15th century that the Barbary corsairs started to become a menace to Christian shipping.
Around 1600 AD, European pirates brought advanced sailing and shipbuilding techniques to the Barbary Coast, which enabled the corsairs to extend their activities into the Atlantic Ocean, and the impact of Barbary raids peaked in the early to mid-17th century.
While the Barbary slave trade is typically portrayed as Muslim corsairs capturing white Christian victims, this is far too simplistic. In reality, the corsairs were not concerned with the race or religious orientation of those they captured. Slaves in Barbary could be black, brown or white, Catholic, Protestant, Orthodox, Jewish or Muslim. And the corsairs were not only Muslim; English privateers and Dutch captains also exploited the changing loyalties of an era in which friends could become enemies and enemies friends with the stroke of a pen.
„One of the things that both the public and many scholars have tended to take as given is that slavery was always racial in nature,” said historian Robert Davis, author of Christian Slaves, Muslim Masters: White Slavery in the Mediterranean, the Barbary Coast, and Italy. “But that is not true,“ he added.