Tang of Shang
The Xia Dynasty held suzerainty over a number of kingdoms, one of which was the Kingdom of Shang. During Jie's reign, Shang grew in power, initially at the expense of Xia's other vassals. A person by the name of Zi Lü was able to win many supporters from as many as 40 smaller kingdoms. Tang of Shang recognized that Jie mistreated the people and used this as a way to convince other supporters. In one speech Tang of Shang said that creating chaos is not something he wanted, but given the terror of Jie, he has to follow the Mandate of Heaven and use this opportunity to overthrow Xia. He also pointed out that even Jie's own military generals would not obey his orders.