Sima Yan accepted the abdication of Cao Wei's regime and established the Jin Dynasty. Feeling that Cao Wei's regime suppressed the imperial clan and was replaced by himself, he made the children of the imperial clan king at the beginning of the establishment of the Jin Dynasty, and allowed the kingdom to set up its own army and cancel the standing armed forces of the counties. He also gradually used the kings to command the central military forces to guard key areas such as Jing, Yang and Guanzhong, and gradually replaced the towns with different surnames, thinking that this would ensure that the Jin Dynasty would be forever solid. Unexpectedly, after his death, Sima Zhong, the successor of Jinhui Emperor, was an idiot and lacked the ability to rule the country, so the regime fell into the hands of Yang Jun, a powerful minister and Hui Di's grandfather.
Yang Jun, with the support of his daughter, Empress Dowager Yang Zhi, monopolized Chaogang and pushed out Sima Liang, the king of Runan, to guard Xuchang, causing dissatisfaction among the imperial clan kings. And Jia Nanfeng, the empress, was cruel and violent, lewd and licentious, and wanted to control the state affairs, so she took this opportunity to summon Sima Wei, the king of Chu, who was the military commander of Jingzhou in the first year of Yongping [291], to enter Beijing, let him cooperate with Sima Yun, the king of Huainan, who was the military commander of Yangzhou, and use the power of Ma Gun, an imperial company, to kill Yang Jun in one fell swoop and force the queen mother Yang Zhi to death.
After Yang Jun's death, Sima Liang, the king of Runan, returned to Beijing in accordance with the testamentary edict of Emperor Wu of Jin, and assisted the government together with Wei Guan, a veteran minister. In order to maintain their personal rights, Sima Liang and Wei Guan used small favors to buy courtiers, at the same time, they gradually eradicated the upstarts Dong 'an Gong and Chu Wang, who emerged when Yang Jun was wiped out, causing the envy of the upstarts and queen Jia Nanfeng. So Jia Nanfeng secretly instigated Hui Di to order Chu Wang to kill Sima Liang and Wei Guan, and then got rid of Chu Wang Sima Wei on the charge of "correcting imperial edict", so that the power of state affairs completely fell into the hands of Jia Hou.
Jia Nanfeng, the powerful queen, acted recklessly. On the one hand, she was notorious for fornicating the harem. On the other hand, he designed to get rid of Prince Sima Yu, and attempted to impersonate his own son with his sister Jia Wu's son, so as to achieve the goal of usurping the Jin Dynasty forever. But because of greed for bribes, he hired the so-called old and incompetent Zhao Wang. The Prince of Zhao was also an ambitious man. He took advantage of the hatred of Prince Sima Yu's clique for Jia Nanfeng, and in the sixth year of Yuankang [296], he secretly took advantage of the convenience of mastering the imperial army to launch a coup, abolishing Jia Nanfeng, and Jia Nanfeng was finally poisoned with gold dust wine.
after Sima Lun, the king of Zhao, took charge of the state affairs, he wantonly appointed his cronies and killed dissidents, which made the courtiers feel afraid for themselves. In the first year of Yongning [31], he abolished Hui Di and Sima Zhong and became emperor himself. In the same year, King Sima Jiong of Qi [guarding Xuchang], King Sima Ying of Chengdu [guarding Yecheng] and King Sima Yu of Hejian [guarding Guanzhong] set out to crusade against King Sima Lun of Zhao. From then on, the town army took part in the civil war, and the battlefield extended from Luoyang and Chang 'an to the vast areas north and south of the Yellow River. As a result, Sima Lun, the king of Zhao, was killed and Hui Di was reset. The state affairs were controlled by Sima Tang, the king of Qi who occupied the capital by military strength.
After the King of Qi came to power, he wantonly appointed pro-Party, rejected dissidents, and was extravagant and corrupt, which had a profound contradiction with Sima Yu, the king of Hejian who also coveted political affairs. Hejian Wang joined forces with Sima Ying, the king of Chengdu, who also lost power and influence, to denounce the crimes of Qi Wang, and deliberately provoked unrest in the capital to induce Qi Wang to kill ismail, the king of Changsha, in an attempt to find an excuse to get rid of Qi Wang, so as to attack the capital and kill Qi Wang. However, it backfired. Although the King of Qi was killed, ismail, the king of Changsha, who was weak in strength but close to the water, held the court affairs.
Although Changsha King carefully ruled the court affairs, he was still found an excuse by Hejian King Sima Yu, who failed to achieve his goal. So Hejian King once again joined forces with Chengdu King Sima Ying and set out for the capital. The protracted war eventually led to civil strife in Beijing. ismail was arrested by the generals in the temple who instigated the rebellion by Sima Yue, the king of the East China Sea, and was killed by Sima Yue, the king of the East China Sea, and was handed over to Zhang Fang, the king of Hejian, to be brutally burned at the stake. The two rebels also returned to their lair because they lost their excuse to fight.
Because of the constant remote control of state affairs, the emperor and courtiers opposed it. Sima Yue, the king of the East China Sea who was in power, and others clamored for Hui Di to personally levy Sima Ying, the king of Chengdu, but he was defeated by Sima Ying in the Battle of Dangyin. Hui Di was captured and the king of the East China Sea fled.
After taking power, Sima Ying, the king of Chengdu, put the emperor under house arrest, killing dissidents, but he lacked a good plan to stabilize the world, which led to the rebellion of Wang Jun, the governor of Youzhou. Wang Jun wooed fierce Wu Huan and Xianbei soldiers into the war, and broke the lair of Yecheng, the king of Chengdu. The king of Chengdu had to flee back to the capital with the emperor in a mess, but he fell into the hands of the king of Hejian, who hijacked the emperor and Sima Ying, the king of Chengdu, and moved to Chang 'an, and Huidi fell into the clutches of Sima Yu, the king of Hejian. Soon after, Hejian Wang was defeated by the Shandong vassal Coalition led by Donghai Wang, and his lair Chang 'an was breached, so Hui Di was able to return to Luoyang. The isolated and hopeless Hejian King had to accept the false invitation of Sima Yue, the king of the East China Sea, and left Chang 'an to return to Luoyang. However, on the way, the father and son were strangled by the cronies of the king of the East China Sea, and Sima Ying, the king of Chengdu, was killed by Liu Yu, the Ministry of Sima Yi, the king of Fan Yang, and returned to the hands of the king of the East China Sea again.
in the first year of Guangxi [36], Hui Di died of poisoning, and Sima Chi, the emperor's eldest brother, was made emperor. But at this time, the civil war has lasted for 16 years, and the armies burned and looted, which greatly damaged the production in the north and caused great suffering to the people. The ruling power of the Western Jin Dynasty has also been exhausted, while the western and northern minority regimes have risen successively. The Western Jin Dynasty was finally destroyed by the Han State established by Hun Liu Yuan in 316 AD.