Zhao's general did not follow Xiang Yu into the customs and was not sealed. Chen Yu was dissatisfied with Xiang Yu's packet. Seeing that Tian Rong betrayed Xiang Yu, he borrowed soldiers from Tian Rong and beat back Zhang Er, the king of Changshan. Chen Yu welcomed Zhao Xie as the king of Zhao, and Zhao Xie thanked Chen Yu and made him king. Because Zhao Xie was weak, he stayed to help Zhao Xie and sent Xia to say that he would return to China.
At the same time, Hanwang Liu Bang, who is in Hanzhong and Bashu, is ready to capture the land of Sanqin in Guanzhong. When Xiang Yu was enfeoffed, in order to prevent Liu Bang from moving eastward and competing for the world, three Qin generals, Zhang Han, Sima Xin and Zhai Wang, were set up in Guanzhong, and Liu Bang's primary goal was to occupy the Guanzhong area.
Xiang Yu learned of Tian Rong's rebellion and led the Chu army to attack Tian Rong of Qi. Taking this opportunity, Liu Bang knew it was time to capture Guanzhong, so he moved eastward. Liu Bangxian sent Cao Can to attack Chencang from the old road, and then Liu Bangxian led tens of thousands of Han troops from Nanzheng to Chencang from the old road. Zhang Han led the army to stick to the land of Chencang, and it was difficult for the Han army to fall. Zhao Yan gave Liu Bang an idea to bypass the front of Chencang through a mountain road. Liu bang
After seizing Chencang, Liu Bang sent Fan Kuai to lead the troops to defeat the light cavalry in the south of Yongcheng, so that he led the army to seize Yongcheng, and was defeated by Liu Bang in Chencang, so that his younger brother Zhang stood guard and led the army to retreat to the waste hills. Cao Can, Zhou Bo and Fan Kuai led the troops to attack Haowen, and Zhang Ping was defeated and fled. After the Han army captured Haowen, Cao Can, Zhou Bo and Fan Kuai led the troops to attack Xianyang, defeated Zhao Ben and Neishi Bao's army and captured Xianyang City.
After the Han army captured Xianyang, Liu Bang sent Guan Ying to attack Oak Yang, the capital of Sima Xin, and sent Zhou Bo to capture Qixian. Zhang Ping led Sima Xin and Dong Kun to save Zhang Han, and Cao Can led his troops to stop the road in Jingling. After Sima Xin surrendered, other Han troops defeated Zhang Ping's reinforcements with Cao Can.
Zhangping was defeated,,,, Fan Kuai led the troops to continue to besiege Zhang Han in the wasteland, Li Shang led the troops to the north, defeated the subordinate troops and Zhou Lei and Su Yi, and Liu Bang sent Ding Fu and Zhu Lingbing to defeat Zhai Wangjun in the high slave, making Dong Yi surrender, and Jin Yi.
In June of the second year of Han Dynasty, the Han army flooded the waste hills, and the city broke Zhang Han and committed suicide. The Han army completely pacified Guanzhong. After Liu Bang occupied the Sanqin area, he basically occupied the original territory of Qin during the Warring States period, which became the basis for Liu Bang and Xiang Yu to compete for the world. Liu bang lied to Xiang Yu that his goal was Guanzhong area and he would not lead the army eastward again.
Xiang Yu attacked Tian Rong with a sigh of relief. He was unprepared for Liu Bang. After being defeated by Xiang Yu, Tian Rong was killed by the people of Pingyuan County. Tian Rong's younger brother Tian Heng collected down archers and occupied Chengyang. Xiang Yu couldn't attack for a long time, and he was deeply involved in Qi State, which gave Liu Bang an opportunity. Liu bang led a great army to cross the river eastward, all the way forward. Wei Bao of Wang Wei, Sima Qian of Yin and Shenyang of Henan surrendered to Liu Bang.
When he was in Luoyang, Liu Bang accepted Dong Gong's suggestion, took Xiang Yu's killing Yi Di as the slogan, made the whole army observe three days of silence for Yi Di, and issued an obituary to accuse Xiang Yu of his crimes to the world governors, using this as an excuse to call on the governors to lead the army to crusade against Xiang Yu and avenge Yi Di and himself, so Liu Bang began to confront Xiang Yu.
At this time, Xiang Yu was still trapped in the Qi War, and Liu Bang joined forces with Serbia, Wei, Zhao, Zhai and Yin to attack Chu. The soldiers split into two roads. A route led by Cao Can and Guan Ying attacked Dingtao and defeated the armies of Long and Xiang Yu. Liu Bang led the main force to attack Pengcheng. On the way, Peng Yue led thirty thousand troops to take refuge in Liu Bang. Liu sent Peng Yue to attack Emperor Liang and Fan Kuai to attack the northern counties to stop Xiang Yu.
After Liu Bang and the vassal army entered Pengcheng, they thought that Xiang Yu's defeat had been decided, and they drank all day to celebrate. At this time, Xiang Yu left the army and continued to attack Qi, leading 30,000 cavalry south. Liu bang was unguarded. He first defeated Fan Li in Luxian County, and then went around to the west of Pengcheng to attack the Han army in Pengcheng in the early morning. Lv Ze of Xiayi didn't know it. Liu bang led his troops out of Pengcheng and fled in Surabaya. Xiang Yu led the Chu army in pursuit.