The break between Li Jiancheng and Li Shimin is an inevitable thing.
Most of the Tang Dynasty was laid down by Li Shimin and his generals. According to merit, most of the cake of datang should be distributed to Li Shimin and his generals. Li Yuan claimed the title of empress, but in accordance with the principle of the primogeniture system, Li Jian was established as the crown prince.
After Li Jiancheng was made crown prince, he felt that his younger brother Li Shimin's meritorious service was too high, and there were too many military generals under his command, and his strength was too strong, threatening his own throne, so he not only did not want to reward Li Shimin and his generals, but also painstakingly suppressed them, which caused irreconcilable contradictions between the two major groups of Li Jiancheng and Li Shimin, and it was only a matter of time before they fought to the death.
Under the constant suppression of the crown prince Li Jiancheng, Li Shimin's military generals, for their own interests, began to force Li Shimin to make an early decision and get rid of the crown prince Li Jiancheng and his henchmen, but Li Shimin hesitated and could not make up his mind because he was jealous of these 3 famous generals.
First, Li Jing
Li Jing was the first general of the Tang Dynasty.
Li Jing was the nephew of the famous Sui Dynasty general Han Huhu, who was very talented and skillful. The Sui Dynasty official Shangshu Niuhong praised him for having the "talent of Wang Zuo", and the sui dynasty's famous servant Yang Su YangSu, who sat on the bed, said to him: "You should finally sit in this position!" "That is, Li Jing can be a minister."
Li Jing initially served as a general in the Sui Dynasty, and his future was unlimited, but later, the Tang army attacked Luoyang, the capital of the Sui Dynasty, and Li Jing was also captured by the Tang army.
Li Jing chose to surrender to the Tang army.
In the third year of Wude, Li Jing followed Li Shimin in defeating Wang Shichong and Dou Jiande, eliminating two strong enemies for the Tang Dynasty. Subsequently, Li Jing followed Li Xiaogong, the governor of Kui Prefecture, to pacify Xiao Milling of Southern Liang, as well as the peasant rebel army's auxiliary gongfu, and he also pacified the Lingnan region, etc., and made great achievements for the Tang Dynasty to pacify the world. After the establishment of the Tang Dynasty, Li Yuan appointed Li Jing as the commander-in-chief of the march and asked him to guard Lingzhou and guard against the Turks.
Li Jing's talent was not under Li Shimin and his generals, so Li Shimin was quite jealous of Li Jing, and before he launched the Xuanwumen Incident, he specially sent someone to inquire about Li Jing's opinion. Li Jing neither participated in nor opposed it. Li Shimin was relieved and immediately launched the Xuanwumen Incident, killing Li Jiancheng and Li Yuanji. If Li Jing opposed this, Li Shimin would be in trouble, and Li Jing might unite with Luo Yi and other generals loyal to Li Jiancheng to fight against him, and Li Shimin would not be far from defeat.
2. Li Ji
Li Ji is also a top player.
Li Ji (李勣), whose original name was Xu Shixun (徐世勣), was initially a general of Wagangzhai . After Li Mi killed Zhai Rang, the former leader of Wagangzhai and others because of his seizure of power, the people of Wagangzhai were scattered and began to decline. After Qin Qiong and others were defeated, they surrendered to Wang Shichong and then defected to the Tang Dynasty. Li Ji was always loyal to Li Mi and never had two hearts. After the general trend of Wagangzhai had gone, he followed Li Mi and defected to Li Yuan.
After returning to the Tang Dynasty, Li Yuan looked down on Li Mi, but favored Xu Shixun and gave him the surname of Li, causing Xu Shixun to change his name to Li Ji. Li Ji followed Li Shimin in defeating Wang Shichong, Dou Jiande, and Li Jing to attack and destroy Fu Gongruo, and made great achievements for the Tang Dynasty to win the world.
After Li Yuan declared himself emperor, he appointed Li Ji as the commander-in-chief of the march, and let him defend the prefecture at Zhenzhou to resist the Eastern Turks who wanted to invade the Tang Dynasty.
Li Shimin was also quite jealous of Li Ji, and before launching the Xuanwumen Incident, he sent someone to inquire about Li Ji's opinion. Li Ji and Li Jing agreed that they neither participated nor opposed, which gave Li Shimin a reassurance pill and made Li Shimin decisively launch a coup d'état and get rid of Li Jiancheng.
3. Luo Yi
Luo Yi is the ace general under Li Jiancheng.
Luo Yi has a fierce and cunning personality, tough and stubborn, but he is also a fierce general who is familiar with military affairs and can fight well. Luo Yi was originally the son of the Sui Dynasty general Luo Rong, who followed the Sui Emperor on an expedition to Goguryeo and others, and made great military achievements, and he was also promoted by the Sui Emperor to be a general of the Tiger Benlang.
During the Sui Dynasty, after the great chaos in the world, Luo Yi took the opportunity to develop his power and became a prince of the hegemonic side, but his strength could not compete with Li Mi, Li Yuan and others, so Luo Yi very sensibly turned to Li Yuan and became a general under Li Yuan. Luo Yi's ability was very outstanding, which made Li Yuan admire him very much, and he crowned Luo Yi as the King of Yan, and also gave Luo Yi the surname of Li and made him change his name to Li Yi.
After arriving in the Tang Dynasty, Luo Yi followed Li Shimin to break Liu Heimin and made great achievements for the Tang Dynasty to win the world. Soon after, Liu Heimin made a comeback. The crown prince's adviser Wei Zheng, in order to make the crown prince establish meritorious service and facilitate the confrontation with Li Shimin, persuaded Li Jiancheng to lead an army to attack Liu Heimin. Luo Yi followed Li Jiancheng to destroy Liu Heimin. At the same time, Li Jiancheng also took the opportunity to draw Luo Yi into his camp.
Luo Yi was able to fight well, and his personality was also very cruel, which made the Turks jealous of him, so Li Yuan arranged for him to go to the town to defend the frontier and defend the Turks. Although Luo Yi was the ace general under Li Jiancheng, during the Xuanwumen Incident, he led the troops outside and could not help Li Jiancheng, resulting in Li Jiancheng being killed by Li Shimin. Subsequently, Luo Yi rebelled, but it was difficult to support alone, and he was eventually defeated and killed by the Tang army.
Luo Yi, Li Jing, and Li Ji were the three generals that Li Shimin was most afraid of, and if they all supported Li Jiancheng, Li Shimin would not dare to launch the Xuanwumen Incident, otherwise, they would jointly raise an army against themselves, and even if Li Shimin succeeded, he would not be able to escape death, but fortunately, Li Shimin had already appeased Li Jing and Li Ji before launching the Xuanwumen Incident, and Luo Yi was alone, so that he successfully resolved the crisis.