The first time: Wei Shu Wu Three Kingdoms At the end of the Eastern Han Dynasty, the world was in chaos, including Dong Zhuo, Lü Bu, Yuan Shao, yuan Shu, but in the end only Cao Cao, Sun Quan, and Liu Bei were left, but except for Liu Bei and Sun Quan, no one else was a real "Three Kingdoms" person. The real formation of the Three Kingdoms began in 220 AD, when Cao Pi forced Emperor Xian of Han to abdicate, the State of Wei was established, and the Eastern Han Dynasty collapsed, which announced the beginning of the Three Kingdoms Era. The following year, Liu Bei was proclaimed emperor in Chengdu, with the state name Han and the historical title shu han. In 229, Sun Quan was proclaimed emperor and Eastern Wu was founded, which officially announced the formal formation of the Three Kingdoms Era. This is also the only historical period in history called the Three Kingdoms. The second time: Eastern Wei, Western Wei, Southern Liang The second three-legged standing occurred at the end of the Southern and Northern Dynasties. At that time, the Northern Wei regime because of the Sinicization policy, provoked the Xianbei old department rebellion, although the rebellion was finally suppressed, but the Northern Wei imperial family completely lost power, was controlled by the warlord Erzhu Rong, who rose in the war, the Northern Wei emperor in order to kill him, planned an assassination, and then he used this as a reason to create the Heyin Revolution, killing the emperor, empress dowager and more than 2,000 civil and military officials of the Northern Wei, and causing a great split in the Northern Wei ruling clique. A few years later, Erzhu Rong himself died in a palace coup, and after Erzhu Rong's death, the remnants of him eventually rose through a scuffle, gao huan and Yuwen Tai, who supported a Northern Wei emperor as a puppet, Gao Huan occupied Hebei and Henan, and established Eastern Wei, while Yuwen Tai dominated Guanzhong and Bashu and established Western Wei. And the Liang Dynasty in the south, taking advantage of the great chaos in the north, The Liangwu Emperor Xiao Yan sent Chen Qingzhi to lead the Northern Expedition of seven thousand white-robed troops, wanting to take this opportunity to support a puppet emperor, Chen Qingyi attacked the city and pulled out the village, invincible, creating the myth of "the famous master Mo Zi prison, a thousand armies and horses avoid the white robe", but in the end Chen Qingzhi was defeated by Erzhu Rong, and then the Liang Dynasty stood on three feet with Eastern Wei and Western Wei. The third time: Northern Zhou, Northern Qi, Southern Chen The third three-legged Dingli was the second three-legged Dingli inheritance, after the death of Gao Huan, the founder of Eastern Wei, his second son Gao Yang deposed the puppet emperor and proclaimed himself emperor to establish Northern Qi, at the same time, the founder of Western Wei, Yuwen Tai, also died, and his successor Yuwen Jue also deposed the puppet emperor of Western Wei and established Northern Zhou. Both countries in the north changed dynasties and had a new imperial family, while the Liang dynasty in the south also did not escape the end of the overthrow, after Gao Huan's death, his general Hou Jing disobeyed Gao Huan's son Gao Cheng, rebelled, was defeated by Murong Shaozong and fled to Southern Liang, after arriving in Southern Liang, Hou Jing was reused by Emperor Wu of Liang, but later Emperor Wu of Liang was dazed and incompetent, Hou Jing took the opportunity to rebel and killed Emperor Wu of Liang and the newly established emperor, but soon Hou Jing's rebellion was put down, Southern Liang was overthrown, and Chen Baxian rose up in the suppression of Hou Jing's rebellion, eliminated Wang Sheng, and then declared himself emperor to establish Southern Chen This was the last confrontation after the end of the Han Dynasty, known as the Post-Three Kingdoms Era. The fourth time: Northern Song, Western Xia, Liao State In the last years of the Tang Dynasty, after the annexation war, the formation of ten kingdoms antagonism, to Zhao Kuangyin usurped the throne to establish the Song Dynasty, the Northern Song Dynasty ended the great division of the five dynasties and ten kingdoms, but the Northern Song Dynasty did not continue the strategy of the Later Zhou Before the North and then the South, but went all out to unify the South, when the South was unified, the Northern Steppe had also been unified, and a huge imperial Liao State was established, the Northern Song Lost the Best Opportunity, and from then on it could only form a Song and Liao confrontation situation, until the Alliance of The Yuanyuan, the two sides were about brotherly countries. After the unification of the Northern Song Dynasty, the land of the five northwestern states was annexed, and the dangxiang at that time surrendered to the Song Dynasty, but some dangxiang people were not satisfied, launched a rebellion, and occupied the Hexi states, and eventually established the country as emperor, in the subsequent Song-Xia war and the Liao-Xia war, after the Xia state won many victories, the Song Liao had to recognize the establishment of the Western Xia, the successful survival of the Western Xia, and finally formed a situation of the Three Kingdoms. The fifth time: Southern Song Dynasty, Western Xia, Jin Kingdom In the late Period of the Northern Song Dynasty and the Liao State, the Jurchen clan in the northeast rose up, openly claimed the emperor, rebelled against Khitan rule, and continuously destroyed the main force of the Liao State with lightning speed, and finally destroyed the Liao, when destroying the Liao State, the Jin Army saw the corruption of the Song Army, decided to continue to attack, destroy the Song Dynasty, and quickly ruled the Central Plains and became the new overlord. The only prince of the Song Dynasty, Zhao Shuo, fled to the south to establish the Southern Song Dynasty, and the Jin army also stopped attacking because it expanded too quickly and the rear was unstable, so the Xia Kingdom did not perish, and when the Jin Rule was completely stabilized, the combat effectiveness of the army was seriously corroded, and it was no longer able to destroy the Southern Song Dynasty and the Xia Kingdom, so it once again formed a three-legged stand. Then the rise of The Mongols, Genghis Khan destroyed the Western Xia, Wokoutai destroyed the Jin, Möngke destroyed Dali, Kublai Khan destroyed the Southern Song Dynasty, the world was unified again, and from then on, there was no real meaning of the Three Kingdoms.