What is history: it is the echo of the past to the future, the reflection of the future on the past. - Hugo
Empress Li Yuan of Tang Gaozu had four sons: the eldest son Li Jiancheng, the second son Li Shimin, the third son Li Xuanba (who died early), and the fourth son, Li Yuanji. Among these four sons, the eldest son, Li Jiancheng, was shrewd and capable, and the fourth son, Li Yuanji, was a brave and martial superman. However, the most successful and strategic of the battles was Li Shimin several times.
As early as when Li Yuan was still suppressing the peasant rebel army, Li Shimin had already seen that the demise of the Sui Dynasty was irreparable. He said to his father Li Yuan, "You were ordered by the Sui Dynasty to fight against the thieves, can the thieves really be completely eliminated?" When prompting his father to start an army, Li Shimin also said: "Today, it is you who break the family and destroy the country, and it is also in you to transform the family into a country", which shows Li Shimin's great talent.
In 617, Li Yuan, with the support of Li Shimin, rebelled against the Sui in Taiyuan and soon occupied Chang'an. In 618, after the Sui Emperor was killed, Li Yuan established the Tang Dynasty and made Li Jiancheng crown prince. It is said that when Li Yuan rebelled in Taiyuan, he promised Li Shimin to make him crown prince after the incident was completed. However, after the world was pacified, Li Shimin's fame grew, but Li Yuan hesitated. Li Shimin, the king of Qin, swept away all kinds of anti-kings, and his merits were high, and he was hated by the crown prince Li Jiancheng and Li Yuanji, the king of Qi, and Li Jiancheng, in order to keep the position of crown prince, joined forces with Li Yuanji, the king of Qi, to exclude Li Shimin at every turn. Li Yuan's indecisiveness also caused the government decrees of the DPRK and China to conflict with each other, and accelerated the soldiers of the sons to meet each other.
In 626 (the ninth year of Wu De), the two sides had become a sword-fighting situation. Once, the crown prince Li Jiancheng went to Li Shimin for a drink at night, and poisoned the wine, Li Shimin was heartbroken, vomited a few liters of blood, fortunately, Li Shentong, the king of Huai'an, sent Li Shimin back to the Qin palace to be saved. Li Jiancheng and Li Yuanji did not stop there, but on the contrary tightened their actions. He first tried to pull away the living forces around Li Shimin and used a large cart of gold and silver utensils to envelop Wei Chi Jingde, who politely refused, "The King of Qin had the grace of knowing me, took me in when I was most depressed, and entrusted me with a heavy responsibility, I only had to kill myself in retribution, and did not dare to have two hearts for him", Li Jiancheng touched a big nail, and hated Wei Chi To the bone.
The contradiction between the prince and the king of Qin intensified, to the extent that the king of Qin took the initiative to go to the eastern capital to avoid disaster. When the Turks invaded the border, Li Yuan asked Li Yuanji to be the commander, and the strong generals of the Qin Dynasty palace sent their elite soldiers to Li Yuanji's tent to listen to orders, and the arrows were on the string, and had to be sent, while Li Shimin was still hesitating. Wei Chi Jingde was extremely anxious, and together with the crowd encouraged Li Shimin to preemptively attack, "People are afraid of death, and everyone serves the king with death. If the heavens and do not take it, but to be blamed for it", Li Shimin still wanted to wait for the other party to move first, so as not to fall into the name of the insult, Wei Chi Jingde threatened, "If the King of Qin does not listen to our opinions, we can only flee, we can not sit with His Highness and wait to die, the eldest son Wuji will also leave with me", at the same time told Li Shimin that he has gathered eight hundred warriors, all of whom are armed with strings, and are ready to listen to the dispatch of the King of Qin, at this point, Li Shimin, the King of Qin, can only grit his teeth and gamble his life.
In the ninth year of Tang Gaozu Wude (626 AD) On June 4 of the lunar calendar, the Xuanwumen Mutiny broke out, Li Jiancheng, who was preparing to enter the palace, was shot dead by Li Shimin with an arrow, Li Yuanji fled into a forest, Li Shimin chased after his horse, the war horse ran too fast, Li Shimin was swept off the war horse by a huge branch, fell to the ground, Li Yuanji saw the opportunity, rushed over and snatched Li Shimin's bow, strangled Li Shimin's neck with a bow string, Wei Chi Jingde appeared in time, a loud drink, scared Li Yuanji to let go of his hands, Li Yuanji fled to the palace, Wei Chi Jingde caught up with his horse and killed him with one arrow.
The 2,000 elite soldiers under Li Jiancheng and Li Yuanji found it bad, and it was too late. They attacked Xuanwumen in a menacing manner and killed the general of Tunying, Wei Chi Jingde saw that the situation was critical, beheaded Li Jiancheng and Li Yuanji, and loudly signaled to the two sides who were fighting, the people of the Eastern Palace and the Qi Palace saw that the lord was dead, suddenly lost their fighting spirit, and the birds and beasts dispersed, Li Shimin immediately sent Wei Chi Jingde into the palace, and forced Li Yuan of Tang Gaozu into the palace, and when Wei Chi Jingde, who was well-armored and armed with weapons, came to Gaozu Li Yuan, Li Yuan immediately understood what had happened and made Li Shimin the crown prince. He ordered the military state to listen to the crown prince no matter how big or small. Soon, Li Shimin took the throne with the era name Zhenguan.