Zhou Dynasty

The Zhou Dynasty was the longest dynasty in Chinese history, from 1027 to approximately 221 B.C. By the end of the 2nd millennium BC, the Zhou Dynasty began to emerge in the Yellow River valley, overrunning the Shang. The Zhou appeared to have begun their rule under a semi-feudal system. The Zhou were a people who lived west of Shang, and the Zhou leader had been appointed "Western Protector" by the Shang. The ruler of the Zhou, King Wu, with the assistance of his brother, the Duke of Zhou, as regent managed to defeat the Shang at the Battle of Muye. The king of Zhou at this time invoked the concept of the Mandate of Heaven to legitimize his rule, a concept that would be influential for almost every successive dynasty. The Zhou initially moved their capital west to an area near modern Xi'an, near the Yellow River, but they would preside over a series of expansions into the Yangtze River valley. This would be the first of many population migrations from north to south in Chinese history.