Among these Lac Viet tribes was the Van Lang, which was the most powerful tribe. The leader of this tribe later joined all the tribes together to found Van Lang Nation in 2897 BC, addressing himself as the King Hung. The next generations followed in their father's footsteps and kept this appellation. Based on historical documents, researchers correlatively delineated the location of Van Lang Nation to the present day regions of North and north of Central Vietnam, as well as the south of present-day Kwangsi (China). The Van Lang Nation lasted to the 3rd century B.C.