Treenailed boats were use used by viking in which centuries?
Treenailed boat The treenailed boat is a boat model used in Northern Europe, usually associated with Vikings but should perhaps be ascribed to Pomeranian groups. The shape and construction coincides with the sewn boats, but instead of ropes, it is assembled with wooden treenails.
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.