Western Zhou

The Western Zhou (; 771 BC) was a period of Chinese history corresponding roughly to the first half of the Zhou dynasty. It began when King Wu of Zhou overthrew the Shang dynasty at the Battle of Muye and ended in 771 BC when Quanrong pastoralists sacked the Zhou capital at Haojing and killed King You of Zhou. The "Western" label for the period refers to the location of the Zhou royal capitals, which were clustered in the Wei River valley near present-day Xi'an.

The early Zhou state}} was ascendant for about 75 years; thereafter, it gradually lost power. The former lands of the Shang were divided into hereditary fiefs that became increasingly independent of the Zhou king over time. The Zhou court was driven out of the Wei River valley in 771 BC: this marked the beginning of the Eastern Zhou period, wherein political power was wielded in actuality by the king's nominal vassals. Provided by Wikipedia