Xiang Yu
In 203 BC, while Xiang Yu was retreating eastward, Liu Bang, acting on the advice of Zhang Liang and Chen Ping, renounced the Treaty of Hong Canal and ordered an attack on Xiang Yu. He also requested assistance from Han Xin and Peng Yue to attack Xiang Yu simultaneously from three directions. However, as Han Xin and Peng Yue did not mobilise their troops, Liu Bang was defeated by Xiang Yu at Guling (固陵; south of present-day Taikang County, Henan). He retreated and reinforced his defences. At the same time, he sent messengers to meet Han Xin and Peng Yue again, promising them land and titles if they joined him in attacking Xiang Yu.