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At the Hongmen banquet, Liu Bang showed a high degree of composure and calmness. To be able to retreat with his whole body, in addition to the efforts of Zhang Liang, Xiang Bo, and Fan Xu, the key is Liu Bang's calmness and composure.

After the Hongmen banquet, Xiang Yu led his troops westward, Xiang was registered in Xianyang, burned Afang Palace, and killed the prince of Qin. Liu Bang was named the king of Han, and the territory was Ba, Shu and Han ** 41 counties, and the capital was Nanzheng (now southwest Zheng, Shaanxi). And sealed the Qin generals Zhang Han, Sima Xin, and Dong Fei (meaning) as the king of Yong, the king of Sai, and the king of Zhai, and led the central land to contain Liu Bang. At the same time, Liu Bang's army was reduced to 30,000. Xiang Yu proclaimed himself the overlord of Western Chu and held the supreme command of the army. Xiong Xin, the king of Chu Huai, was revered as the righteous emperor. Later, Xiang Yu moved Emperor Yi to Chenxian and killed him.

Xiang Yu's separation, on the surface, seems to be rewarding meritorious deeds, but in fact, it is a recombination of the forces of the original princes, and the obedience is rewarded separately, and the strength and influence of the original princes in their own country are not taken into account. Therefore, the source of chaos was planted from the beginning. Moreover, he rejected the advice of the strategist Ziwang Guanzhong and resolutely returned to his hometown.

In February of the first year of the Han Dynasty, the princes boycotted the play and returned to China. Liu Bang had no choice but to swallow his anger and accept the title, leading his troops into Hanzhong in April and burning the plank road (a road paved with wooden planks on the cliff) to show that he had no intention of going east again, so as to paralyze the Xiang Dynasty. In May and June of the same year, Tian Rong, a descendant of the nobles of the Qi State, was dissatisfied with the separation, drove away the king of Qi, killed the king of Jiaodong, and established himself as the king of Qi. In November, Liu Bang took the opportunity to wave his army eastward, worship Han Xin as a general, repair the plank road in the Ming Dynasty, secretly cross Chencang (now east of Baoji City, Shaanxi Province), return to Guanzhong, and soon defeated Zhang Han, forced to land Sima Xin and Dong Peng, and deceived Xiang with tricks, so that he believed that he was satisfied after obtaining Guanzhong and would never go east again. Xiang Ji was relieved to attack Tian Rong, and did not strengthen his precautions against the west. In the end, they fell into the quagmire of Qidi and could not get out. This gave Liu Bang a great opportunity.

In the second year of the Han Dynasty (205), after Liu Bang basically pacified the Three Qins, he prepared to go east to compete with Xiang Yu for the world. He went out of the customs to Shaanxi to comfort his fathers there. In March, Liu Bang led his army to cross the river from Linjin, and Wei Wangbao followed his troops. Soon captured Hanoi, captured Sima Wei, the king of Yin, and placed Hanoi County. Nandu Pingyinjin to Luoyang, descend to Henan Wang Shenyang. At this time, the three elders of Xincheng, Dong Gong and others stood in front of Liu Bangma to tell the death of Emperor Yi. When the king of Han heard this, he cried a lot, and then mourned for the righteous emperor for three days. Then he issued a complaint of Xiang Yu's great rebellion to the princes and kings, and used this as an excuse to call on the princes and kings to lead troops to crusade against Xiang Yu with themselves to avenge the righteous emperor. Thus officially opened the prelude to the four-year Chu-Han War.

In May 205 BC, Liu Bang took advantage of the opportunity that Xiang Ji was deeply trapped in the Qi State and was unable to withdraw, and led a coalition of 560,000 princes to capture Pengcheng, the capital of Western Chu. The short-lived victory was that Liu Bang lost his mind and drank with the princes every day to celebrate. When Xiang Yu heard this, he hurriedly led 30,000 light cavalry to attack Pengcheng, the coalition army was unprepared, and 100,000 were killed for a while, 100,000 drowned, Liu Bang only led dozens of cavalry to escape, and the anti-Chu alliance led by Han collapsed.

In June of the same year, Liu Bang led his troops to retreat to Xingyang, collected the defeated soldiers along the way, and sent Han Xin to defeat the Chu chasing troops between Xiao Suo, so that he could breathe and stabilize his position, so he reorganized the army and relied on the Guanzhong base and favorable terrain to fight against Xiang Yu for a long time. In July, Zhang Han, who had been stubbornly resisting, was finally defeated and committed suicide, and Liu Bang was completely relieved of his worries; and before fleeing to Xingyang, he sent people to persuade Yingbu to oppose Chu and contact Peng Yue to disturb the rear of Chu; Send Han Xin to open up the northern battlefield, attack Wei and capture Wei Wang Leopard, break the dynasty, destroy Zhao and kill Chen Yu. In the winter of 205 BC, Xiang Yu launched a counterattack and besieged Xingyang, and the situation was very critical. Liu Bang used Chen Ping's trick to make Xiang Yu suspect Fan Zeng, and he didn't use his tactics to force Fan Zeng to return to his hometown in anger. Liu Bang sent Ji Xin to pretend to be himself to go to the Chu army to surrender and take the opportunity to escape from Xingyang. Xiang Ji stepped up the siege of Xingyang and captured Chenggao.

In order to alleviate the pressure of the Chu army on Xingyang, Liu Bang led his army through Wuguan, Wan (now Nanyang), and Ye (now south of Ye County), trying to lure Xiang Ji south. In order to cooperate with the actions of the Han army, Han Xin also led the army to the north bank of the Yellow River at this time to support Xingyang. Peng Yue was attacking Xiapi (present-day south of Pizhou, Jiangsu). Xiang Ji was forced to lead the army back to the rescue, and Liu Bang took the opportunity to recover Chenggao. In July 204 BC, Xiang Ji pulled out Xingyang with a fierce offensive and recaptured Chenggao.

On the one hand, Liu Bang ordered the Han army to hold on to the area of Gongxian to block the advance of the Chu army, and on the other hand, he ordered Han Xin to form a new army to attack Qi, and sent people into the hinterland of Chu to assist Peng Yue in attacking Suiyang County, Waihuang County (now Minquan County) and other places, and once again forced Xiang Yu to come to the rescue. In November 204 BC, Liu Bang used a plan to regain Chenggao (northwest of present-day Xingyang Bishui Town) and killed Xiang Yu's general Cao Ji.

After Xiang Ji defeated Peng Yue, the main force of the Han army failed to fight a decisive battle, and the troops Guangwu (now Xingyang North) formed a confrontation with Liu Bang. Soon, Han Xin annihilated the Qi-Chu coalition army in the Battle of Weishui, completed the strategic detour of the flank of Chu, and sent Guan Ying to lead an army straight to Pengcheng. Xiang Ji suffered from the enemy on his back, and the soldiers were exhausted, so he made an alliance with the Han Dynasty, taking the chasm as the boundary, dividing the world in the middle, returning to Chu in the east and Han in the west. In October 203 BC, Xiang Ji led his troops back to the east.

After the alliance between Chu and Han, Liu Bang wanted to withdraw his troops, but under the reminder of Zhang Liang and Chen Ping, he ordered to pursue the Chu army with all his might. In November 203 BC, the two armies fought at Guling (northwest of present-day Huaiyang), and Xiang Yu won a small victory. In January 202 BC, Liu Bang encircled Han Xin, Peng Yue, and Duo Bu with a reward, and severely damaged the Chu army in the next battle.

In January 202 BC, Liu Bang, Han Xin, Liu Jia, Peng Yue, Yingbu and other Han armies totaling about 700,000 and 100,000 tired Chu troops fought a decisive battle in Qixia (now south of Lingbi County, Anhui). The Han army was centered with Han Xin leading the army, the general Kong Xi as the left wing, Chen He as the right wing, Liu Bang leading the troops to follow, and the general Zhou Bo was broken.

Han Xin waved his army to attack, using the tactic of luring the enemy into depth, the front army was defeated first, Xin led the troops to retreat, and ordered the left and right flank armies to outflank and attack the rear infantry of the Chu army. After the Chu army was tired after a long battle, the Han army divided the Chu rear army and Xiang Yu's former army knights in half, Han Xin commanded the whole army to counterattack, the Chu army was defeated, more than 40,000 killed, 20,000 captured, 20,000 were scattered, and only less than 20,000 wounded soldiers were left to retreat with Xiang Yu.

Later, the Chu army retreated into the barrier and was surrounded by the Han army. The Chu army was exhausted. Han Xin ordered the Han soldiers to sing Chu songs at night, singing clouds: "People's hearts are to Chu, and the world has belonged to Liu; Han Xintun is going to behead the overlord! ”。

As a result, the Chu soldiers were homesick and tired of war, and the military spirit collapsed, Xiang Yu only led 800 people to break through to Wujiang (now Anhui Province and the county border), at this time Xiang Yu only had 28 horses left, and a pavilion chief was willing to take Xiang Yu to flee to Jiangdong to revive the hegemony, but Xiang Yu refused. Xiang Yu took 28 cavalry to fight the Han army, and finally the whole army was annihilated, Xiang Yu did not want to be captured and humiliated, so he killed himself in Wujiang. I want to talk about "Glory of Kings: Sanction System" with more like-minded people, pay attention to "excellent reading literature" on WeChat, talk about life, and find confidants~