In the winter of 192 AD, less than twenty days before Cao Cao surrendered to the Yellow Turban Army in Qingzhou, China was still in a state of warlordism. West of Hangu Pass and east of Longshan, Li Dai and Guo Feng fought endlessly over Guanzhong, the land of the emperor; east of Longshan, including the eastern part of the Hexi Corridor, new warlords led by Ma Teng and Han Sui also began to emerge; the land of Sichuan was surrounded by heavy mountains, which seemed okay under the administration of the ruler Liu Yan. However, the peasant revolts in his jurisdiction also rose and fell, disturbing Liu Yan's uneasiness; south of Hengshan Mountain, north of Zhongtiao Mountain, east of the Yellow River, and west of taihang Mountain (present-day Shanxi Province), once a strategic place of the Eastern Han Dynasty, was also divided by the White Polish Army, the Black Mountain Army, the Xiongnu, and the Taishou Zhangyang of Hanoi; the contest between Yuan Shao and Gongsun Zhan, north of the Yellow River and east of the Taihang Mountains, had just begun; south of the Yellow River and north of the Yangtze River, Cao Cao, who had just won the victory against the Yellow Turban Army in Qingzhou, immediately contested Yuan Shu, who had divided Nanyang. However, with Cao Cao's defeat of Yuan Shu, the war situation in the Central Plains gradually became clear.
After Yuan Shu's defeat, he led the remnants of his army to flee all the way to Shouchun (Shou County, Anhui) south of the Huai River to establish a foothold. Since then, the two giants south of the Yellow River and north of the Yangtze River have only been Left, Xuzhou TaoQian and Yanzhou Cao Cao. In the spring of 193, Cao Cao used the excuse of "avenging his father" and marched east to Xuzhou. Cao Cao's troops fought for the rest of their lives, and they were fierce and good at fighting, and the Xuzhou army was repeatedly defeated, and could only be trapped in Xia PiCheng, and the Cao army repeatedly attacked and suffered many casualties. In order to vent his anger, Cao Cao issued a massacre order. For a time, Xuzhou "chickens and dogs are also exhausted, and there are no more pedestrians in Xuyi". The following year, Cao Cao attacked Xuzhou again, and as with the last time, he was "killed by too much". Such cruel behavior inadvertently induced the dissatisfaction of Cao Cao's courtier Chen Gong. Subsequently, Chen Gong secretly contacted Chen Liu to guard Zhang Mi and planned to welcome Lü Bu into Yanzhou.
Lü Bu , also spelled Fengxian , is a native of Jiuyuan, Wuyuan County. In the early years, "with Xiao Wu to the state. Thorn Shi Ding was originally a knight lieutenant, Tun Hanoi, with cloth as the main thin, and treated him with affection. From this historical data, we can see that Lü Bu was not a simple warrior, but also very proficient in copywriting, in charge of the money and grain miscellaneous affairs in Ding Yuan's army. After Wang Yunmei planned to kill Dong Zhuo, because of improper handling, he triggered an attack on the remnants of the Western Liang Army. Subsequently, Lü Bu led his army to meet the battle, but was defeated by the combined forces of Li Dai, Guo Feng, Fan Chou, and Li Meng, so he led more than 100 cavalry to flee in a hurry, taking Wuguan to surrender to Yuan Shu in Nanyang, but Yuan Shu refused. Subsequently, Lü Bu defected to Yuan Shao. After solving the Black Mountain Army on the Taihang Mountains for Yuan Shao, Yuan Shao was dissatisfied with Lü Bu's frenzied attitude and sent people to plot against Lü Bu, and Lü Bu escaped, so he defected to his old friend Zhang Yang in Hanoi. On the way, Lü Bu, who passed by Chen Liu, became acquainted with Chen Liu's taishou Zhang Mi.
Although Zhang Mi was a good friend of Cao Cao, he had been living in fear. Earlier, in 190 AD, when the Eighteenth Route princes were rebelling against Dong Zhuo, Zhang Mi was dissatisfied with Yuan Shao's lack of enterprising and complained a few words. Yuan Shao was furious when he heard this, and immediately approached Cao Cao and ordered him to eliminate Zhang Mi, but Cao Cao immediately refused. Subsequently, Zhang Mi had been following Cao Cao on his eastern expeditions to the west, and was very hard at work. Not long ago, Zhang Mi heard another news: after hearing that Zhang Mi had received Lü Bu, Yuan Shao once again sent someone to order Cao Cao to eliminate Zhang Mi. At this time, Yuan Shao had won the Battle of Jieqiao and fully reduced Gongsun Zhan's power. Zhang Mi was old enough to be in the situation, and he was afraid that after Yuan Shao unified Hebei, Cao Cao would kill himself for his own selfishness and flatter Yuan Shao. Instead of this, it is better to support an enemy of Yuan Shao, Lü Bu is just right.
In 194, Zhang Mi and Chen Gong welcomed Lü Bu into the strategic city of Puyang. For a time, Dong County and Yan Prefecture "responded", and Cao Cao was left with only Fan County, Dong'a (YangGu), and Zhencheng. Cao Cao, who was on the front line in Xuzhou, heard that the old nest had been raided, and quickly returned to Yanzhou with his troops to besiege Puyang. In Puyang City, the Tian clan of the Great Clan opened the city gate in response, and Cao Cao personally led the elite into the city, and the battle was once very fierce. In the end, Cao Cao lost the battle of Xiangxiang and could only escape from Puyang City, and the two sides immediately fell into a tug-of-war. The Yanzhou area has suffered from long-term war, and the peasants have no stable environment to engage in agricultural production. At the same time, the locusts were on fire that summer, and it was difficult for both sides to collect enough grain and grass. Therefore, both sides tacitly resigned at the same time. Lü Bu retreated to Shanyang (Jinxiang), and Cao Cao retreated to Zhen Cheng.
Just as Lü Bu was retreating to Shanyang, the most dramatic scene in the history of the Three Kingdoms appeared. The Chronicle of the Three Kingdoms records that "Taizu led the army back and fought with The Cloth in Puyang, and the Taizu army was unfavorable and held out for more than 100 days." It was drought, locusts, and grains, and the people couldnibalize each other, and the cloth was broken by Li Jin, a member of his county, and Dongtun Shanyang. The Zizhi Tongjian Scroll also reads, "In September, fu returned to the city." Bu to the Chengshi clan, broken by his county man Li Jin, Dongtun Shanyang. Of course, the reason why Li Jin was able to win was that Lü Bu took the initiative to withdraw from the battlefield. The reason for this was that the exhausted Lü Bu was afraid that Li Jin was in front and Cao Cao was in the rear, and the two attacked him. However, after Li Jin completed the only head-on defeat of Lü Bu in history, he disappeared and never appeared in the historical records again!