The chronology of King Wu's overall reign is disputed. However, his reign as the ruler of
Predynastic Zhou is thought to have begun in 1050 BC, and his reign as King of China is thought to have begun around 1046 BC. He is then thought to have died around three years later.
King of Predynastic Zhou , cast seven days after the
Battle of Muye. Upon his succession as king of
Predynastic Zhou, King Wu worked with his father-in-law
Jiang Ziya to accomplish an unfinished task: overthrowing the Shang dynasty and its ruler,
Di Xin, who was alleged to be a cruel and inept tyrant. During the ninth year of his reign, King Wu made a sacrifice at Bi (). He was assisted by
Duke Dan of Zhou, the Duke of Bi, and the
Duke of Shao in carrying out
King Wen of Zhou's ambition. He marched down the
Yellow River to the
Mengjin ford and met with more than 800 elders. As the boys were led away, King Wu took advantage of Shang disunity to begin the attack on the plain along with many neighbouring elders, beginning the
Battle of Muye. Upon approaching the battlefield, King Wu delivered the Oath at Muye (), recorded in the
Book of Documents, which states that King Wu united people from the states of Yong (),
Shu (),
Qiang, (), Mao (), Wei (), Lu (),
Peng (), and Pu () to aid his assault. Di Xin, hearing of the rebellion, deployed 700,000 soldiers to intercept the oncoming assault. Despite the numbers advantage, many Shang soldiers, who were slaves or otherwise disliked Di Xin, defected to King Wu's combined army, allowing for a total defeat. The
Battle of Muye destroyed Shang's forces and then-ruler
Di Xin set himself and the
Deer Terrace Pavilion on fire, killing himself within. However, its authenticity is disputed. The methods used by King Wu at the Battle of Muye are uncertain. Wang Xingguang and Zhang Qiang argue that King Wu had attacked from the north, based on geographic evidence and the manner in which the
Yellow River must have flowed at the time.
King of China , thought to refer to King Wu performing a ritual to
King Wen of Zhou. King Wu followed his victory by composing the
Great Martial Music (). The
Shi Qiang pan and
Yi Zhou Shu imply that King Wu continued his campaign into the
Dongyi to eliminate further threats, including the Cuo (), Biao (), and Yitong ().
Oracle bone evidence from
Zhouyuan (),
Qishan County, seems to imply that King Wu of Zhou had communicated with Shang prince
Wu Geng at some point shortly after the Battle of Muye: …巳,王其乎更,厥父陟。 On the
__si day, the King may call Geng; his father then/had ascended. Lu Guoquan () and Wang Junmei () interpret the line
geng () as being the
geng () in Wu Geng's name, using paleographic evidence from
Liezi. They furthermore note that the
zhi () is a
euphemism for Di Xin's death, using evidence from the
Book of Documents. The scholars therefore believe that Wu Geng was away from
Yin at the time and King Wu summoned him to give the news and organise what to do thereafter. He also made a sacrifice to
King Wen of Zhou around this time, which is detailed on the
Tianwang gui, thought to date to King Wu's reign. Furthermore,
Wu Geng, also known as Lu Fu () and one of the heirs to the Shang throne, was allowed to preserve his state and continue
Shang religious practices. He also enfeoffed Jiang Ziya at Yingqiu, which became
Qi; Duke Dan of Zhou was enfeoffed in Qufu, becoming
Lu; the Duke of Shao was enfeoffed in
Yan, and then his brothers
Shu Xian () in
Guan and
Shu Du in
Cai (). Despite his victory, King Wu did not fully understand why Shang had fallen, and upon asking
Jizi two years later, he was too uncomfortable to say. He also allegedly enfeoffed
Jizi in
Chaoxian (), which would become Joseon,
Korea. The
Bamboo Annals record King Wu hunting in
Mount Song and moving the
Nine Tripod Cauldrons to
Luo () in his 15th year. In the next year,
Jizi came to his court and Pugu () was annihilated. In his final years, he ordered
Wang Shizi to recite at his court, and he died in winter, at 54 years old. ==Personal life==