Treenailed boats were use used by viking in which centuries?
Vikings Vikings (Old English: "wicing"—"pirate", Danish and Bokmål: "vikinger" ; Swedish and Nynorsk: "vikingar" ; Icelandic: "víkingar" , from Old Norse "víkingar "), were Norse seafarers, mainly speaking the Old Norse language, who raided and traded from their Northern European homelands across wide areas of northern, central and eastern Europe, during the late 8th to late 11th centuries. The term is also commonly extended in modern English and other vernaculars to the inhabitants of Viking home communities during what has become known as the Viking Age. This period of Nordic military, mercantile and demographic expansion constitutes an important element in the early medieval history of Scandinavia, Estonia, the British Isles, France, Kievan Rus' and Sicily.
Swedish slave trade The Swedish slave trade mainly occurred in the early history of Sweden when the trade of "thralls" (Old Norse: "þræll") was one of the pillars of the Norse economy. During the raids, the Vikings often captured and enslaved militarily weaker peoples they encountered, but took the most slaves in raids of the British Isles and Slavs in Eastern Europe. This practice lasted in the 6th through 11th centuries until formally abolished in 1335.