In July 304, Wang Jun supported Sima Yue, the king of the Eastern Seas, and borrowed Xianbei and Wuhuan soldiers to attack Yecheng, and after defeating Sima Ying, he allowed Wuhuan and Xianbei soldiers to loot Yecheng.
Later, on the way back to Youzhou, these soldiers were restrained by military discipline, resulting in the tragedy of 8,000 women being killed and sinking to the bottom of the river.
The people of Yecheng were burned by soldiers, and Wang Jun, because of his meritorious service in borrowing troops, was promoted to the title of Grand General of the Hussars and the Assassin of Youzhou, and his power was greatly shaken.
Since then, Wang Jun, who used to be an illegitimate son that no one paid attention to, has now become a prince who everyone has to curry favor with, and it is really a salted fish that has turned over.
In May 306, Wang Jun sent his general Qi Hong to lead the Xianbei and Wuhuan troops to assist Sima Yue in attacking Chang'an.
Xianbei and Wuhuan soldiers tasted the sweetness when they last ransacked Yecheng, and every soldier returned with a full load, so this time it was called to come, and it was also necessary to fight a war.
Sima Yue's coalition forces took Chang'an City without much effort. This time, the people of Chang'an were in trouble.
Qi Hong led his troops to plunder Chang'an, killing more than 20,000 people. The history books record that the sun on that day was as red as blood.
In 307 (the first year of Yongjia), Emperor Hui of Jin died, and Sima Chi took the throne as Emperor Huai of Jin, and changed his name to Yuan Yongjia the following year.
Sima Yue, the king of the Eastern Sea, completely turned himself over at this moment, and he became a taifu and controlled the government.
And Wang Jun, who assisted the meritorious, naturally followed the light and was promoted to Sikong and added to the rank of Karasuma Lieutenant.
The whole world was rotten, and at this time, the Emperor of the Jin Dynasty was no longer able to control the situation, and the power struggle within the imperial court was becoming more and more serious.
Once the imperial court was internally depleted, it had no energy to take care of external affairs, and powerful local warlords began to divide themselves militarily, and many ethnic minorities also took the opportunity to establish their own political power.
Liu Yuan of the Xiongnu called himself emperor, with the founding title "Han", and the historical title was Han Zhao or Former Zhao.
In March 311 (the fifth year of Yongjia), Sima Yue fell ill and died, and marshal Wang Yan led an army to escort his coffin back to the East China Sea. At Ku County (present-day Luyi, Henan), it met the 20,000 troops of the Han Zhao general Shi Le.
Shi Le led his troops to besiege them, and more than 100,000 people were annihilated. After annihilating Wang Yan's troops, he burned Sima Yue's spirit hub.
At this point, the last major force of the Western Jin Dynasty was wiped out, and there were no more soldiers around the imperial court.
At this time, Emperor Huai of Jin in Luoyang City, because there were no soldiers around him, and the capital had been besieged by Liu Yao's army of Han Zhao, he immediately made Wang Jun the Grand Sima (大司馬), Shizhong (侍中), Dadu Governor (大都督), and Du Youji (督幽冀) and ordered him to quickly send troops to Qinwang.
However, before the emissaries could leave, Luoyang had already been captured by Liu Yao and others of Han Zhao, and Emperor Huai of Jin was taken into captivity.
In fact, this was all an unrealistic fantasy of emperor Huai of Jin. His order was to be issued, and Wang Jun had no intention of serving the king. He saw that the edifice of the imperial court would fall at this time, but it breeded the ambition to divide and dominate.
The country could not be left without a master for a day, and Emperor Huai of Jin became a prisoner of the Xiongnu, and Wang Jun took this opportunity to establish a puppet regime.
Wang Jun told the world that a provisional government was set up in Youzhou, and a crown prince was established, and he himself became The Shang Shu Ling, becoming the administrative head of this provisional government.
Because the puppet regime established by Wang Jun was unjustified and unsatisfactory, coupled with the favor of greedy people such as Zao Song and Zhu Shuo, he lost the hearts of the people, and all the ministries who had originally befriended him betrayed him one after another.
Since the lack of subjection, many people loyal to the imperial court, as long as someone advises, their end is either to be transferred or killed.
If the army has money and grain, it is necessary to increase taxes, and the people who were originally stricken by the disaster will have a very difficult life, and this time it will increase the burden of the people and make people angry. At this time, he was already centrifugal here, and the people were rebellious and separated.
Shi Le felt that this was a heavenly opportunity, so he asked the counselor Zhang Bin for advice. Zhang Bin pointed out: Wang Jun was ostensibly a general of the Jin Dynasty, but in fact he had revealed the heart of Sima Zhao, and he was now in a situation of rebellion and separation, and if someone gave him support, he would certainly be very happy. So he suggested to Shi Le that it was better to first call him a vassal, make him lose his guard, and then take the opportunity to sneak attack.
For Zhang Bin's plan, Shi Le accepted it completely. So he sent someone to send a letter to Wang Jun, and offered a generous gift to express his support for his title of emperor.
Wang Jun had just lost the support of Duanbu Xianbei and Wu Huan, and was secretly chafing at it, and suddenly received a letter from Shi Le, how could he not be pleased.
In 314 (the second year of Yongjia), Shi Le began to move, first hiding his elite troops, and then pretending that he would personally go to Youzhou to persuade Wang Jun to claim the title of emperor.
Wang Jun's overseer Sun Wei was more alert, and he suspected that there was deception in it, and ran to request an army to rebel against Shi Le.
At this time, Wang Jun, who was dreaming of the emperor, how could he listen to these advices? He sent a message to Shi Le to come directly, and he arranged for good manpower in the city to welcome Shi Le into the city.
Who knew that as soon as Shi Le entered the city, he revealed his jackal nature and plundered the city.
Shi Le first counted Wang Jun's disloyalty to the Jin Dynasty, and then pointed out that he ignored the people, and although he had stored a large amount of grain, he still did not give aid to the victims affected by natural disasters, saying that after the fall, he ordered five hundred horsemen to escort Wang Jun to Xiangguo, and when he left, he slaughtered all of Wang Jun's elite soldiers.
After arriving in Xiangguo, Shi Le killed Wang Jun, and then gave his head to Liu Cong, the monarch of Han Zhao.
Shi Le planned to kill Wang Jun, made a great contribution, and was even reused by Liu Cong, for which he established his own Hou Zhao and accumulated strength.
Reference: Book of Jin, Tang Fang Xuanling