a Qin army led by Zhang Han at the Battle of Julu. When Xiang Yu arrived at Hangu Pass, he was displeased to hear that Liu Bang had already occupied Guanzhong, so he attacked and conquered the pass, pushing on to west of Xishui (戲水). Liu Bang and his army were based in Bashang (霸上) then. The strengths of Xiang Yu and Liu Bang's forces then were estimated to be 400,000 and 100,000 respectively. Prelude Cao Wushang (曹無傷), a defector from Liu Bang's side, secretly sent a messenger to Xiang Yu's camp, telling Xiang that Liu Bang was planning to declare himself "King of Guanzhong" in accordance with King Huai II's earlier promise, while Ziying would be Liu's chancellor. Cao Wushang also added that Liu Bang had seized all the riches of Xianyang for himself. Xiang Yu was furious when he heard this and planned to attack Liu Bang. Xiang Yu's advisor Fan Zeng felt that Liu Bang posed a threat to his lord so he urged Xiang Yu to eliminate Liu Bang as soon as possible. One of Xiang Yu's uncles, Xiang Bo, shared a close friendship with Liu Bang's advisor Zhang Liang. Xiang Bo feared for his friend's life so he sneaked to Liu Bang's camp to warn Zhang Liang about the peril he was in, telling Zhang to flee. Liu Bang was shocked when Zhang Liang related the news to him, and he sought advice from Zhang to avoid danger. Zhang Liang instructed Liu Bang to enlist the help of Xiang Bo to reduce Xiang Yu's suspicions. Liu Bang met Xiang Bo and treated him like an honoured guest, flattering Xiang Bo and pretending to arrange for a marriage between his son and Xiang Bo's daughter while asking Xiang Bo to plead with Xiang Yu on his behalf. When Xiang Bo returned to Xiang Yu's camp later, he assured his nephew that Liu Bang had no ill intentions, and conveyed Liu Bang's message that he was willing to submit to Xiang Yu. Feast The following day, Liu Bang brought around 100 men with him to meet Xiang Yu at Hong Gate (鴻門), where Xiang had prepared a banquet to entertain him. Liu Bang explained that he managed to enter Guanzhong first because of sheer luck, and apologised to Xiang Yu for robbing him of his glory while extolling Xiang's valour in battle. Liu Bang also explained that