They often made raids on European coastal towns to capture Christian slaves to sell at slave markets in North Africa and other parts of the Ottoman Empire.
ðeɪ ˈɔfən mˌeɪd ɹˈeɪdz ˌɔn jˌʊɹɹəpˈiən kˈoʊstəl tˈaʊnz tə kˈæptʃɚ kɹˈɪstʃən slˈeɪvz tə sˈɛl æt slˈeɪv mˈɑːɹkɪts ɪn nˈɔːɹθ ˈæfɹɪkə ænd ˈʌðɚ pˈɑːɹts ʌvðɪ ˈɑːɾəmən ˈɛmpaɪɚ.