What happen c. 1500 BCE?

The fall of the Shang dynasty was much like that of the Xia dynasty, the last king was a cruel tyrant. Instead of the people overthrowing the king, he was killed by a king from a rival kingdom, the Chou kingdom. The Chou dynasty was part of the Shang kingdom; its civilization was a combination of the Shang culture and that of non-Chinese civilizations. And legend says that Shang Zhou, the last Shang king, committed suicide after his army was defeated by the Zhou people. Legends say that his army betrayed him by joining the Zhou rebels in a decisive battle that took place.