 They were also skilled fishermen and bold sailors, whose long dug-out canoes traversed the eastern sea.According to a legend which first appeared in the 14th century book Lĩnh nam chích quái, the tribal chief Lộc Tục (c. 2919 – 2794 BC) proclaimed himself as Kinh Dương Vương and founded the state of Xích Qủy in 2879 BC, that markes the beginning of the Hồng Bàng dynastic period.However, modern Vietnamese historians assume, that statehood was only developed in the Red River Delta by the second half of 1st millennium BC.