different sides in the war.

After the Shang were defeated, King Wu allowed Di Xin's son Wu Geng to rule the Shang as a vassal kingdom. However, Zhou Wu sent three of his brothers and an army to ensure that Wu Geng would not rebel. After Zhou Wu's death, the Shang joined the Rebellion of the Three Guards against the Duke of Zhou, but the rebellion collapsed after three years, leaving Zhou in control of Shang territory.