西周 (王朝)
↑ "...these early states are best known from archaeology and history to have been ruled by the dynastic houses such as that of Shang (1554–1046 BC) and of Western Zhou (1045–771 BC). Therefore, they can be called the early 'royal states'."
↑ "...The collapse of the Western Zhou state in 771 BC and the lack of a true central authority thereafter opened ways to fierce inter-state warfare that continued over the next five hundred years until the Qin unification of China in 221 BC"