Question: What was the establishment date of this ancient kingdom that was annexed during the Southward expansion of the Han Dynasty, and consisted of the commanderies Nanhia, Guilin, and Xiang?
Sentence (from "Han conquest of Nanyue"): During the reign of Emperor Wu, the Han forces launched a punitive campaign against Nanyue and conquered it in 111 BC as part of the southward expansion of the Han Dynasty.
Relevant evidence: No