At the end of the Eastern Han Dynasty, the struggle for supremacy can be said to be a key node triggered by some accidental factors, which led to the final three kingdoms and the end of a century of chaos:
1. In order to eliminate the eunuchs, the great general He Jin called all the roadside troops to come to the vicinity of Luoyang together, and his move was reasonable, because the influence of the eunuchs in Luoyang has far exceeded that of foreign relatives since the end of the generations, and the last time the Dou family failed miserably, everyone still remembers that since the forbidden army is unreliable, it can only rely on foreign troops, and He Jin is on the one hand calling the roadside troops to demonstrate near Luoyang, while asking his subordinates to recruit troops from all over the place to Luoyang, and everyone restricts each other.
The problem was that no one expected that the result of the battle for Luoyang would actually be that the foreign relatives and eunuchs would end up together, and the scholar group had not yet had time to clean up the situation, and dong Zhuo's desire to enter Luoyang a few days later would be a fool's dream.

2, Dong Zhuo's own military strength, in fact, far from the strongest in the world, at that time can restrain Dong Zhuo's army in large numbers, and his people do not have territory, Liangzhou hometown he has never controlled, Guanzhong Emperor Fusong is not able to control, and the state pastor did not go to office for a day. Saying that Dong Zhuo is a warlord force feels a bit high on him, at best, it is a warlordized army.
And this house actually entered Luoyang when the forces of all sides in Luoyang had not yet been integrated, and they greeted the Han Emperor with their hands, and they actually went against the sky to win all the tens of thousands of forbidden troops in Luoyang to their side.
This was not enough, and the Hezhou Army was originally the army that restrained Dong Zhuo, but this army actually won the Hezhou Army with a single blow, and the even more ridiculous Emperor Fusong sat with heavy troops in Guanzhong, and actually honestly obeyed Dong Zhuo's orders and yielded to Luoyang. This is not something that Dong Zhuo can get on his own, so it is really outrageous.
Historically, Emperor Fusong gave up his military power to enter Luoyang. He was not ordered to attack Dong Zhuo in conjunction with Yuan Shao, and in Dong Zhuo's situation at that time, that is, the siege on all sides was bound to fail, and Emperor Fusong, as a meritorious servant of the Qin King, held heavy troops in his hands and sat in Guanzhong, yuan Shao won what could he do? Just as after the Revolt of the Three Kings usurped the throne of the Zhao King of the Western Jin Dynasty, the King of Chengdu could not help the King of Hejian when he entered Luoyang?
Even if it does not fail, Huang Fusong relies on Guanzhong to attack and retreat. However, Emperor Fusong gave up his military power to enter the capital, and from then on he was no longer a powerful general, and could only rely on prestige and capital to even bend the knee to save his life.
Dong Zhuo thus began with three axes, Dong Zhuo's own Liangzhou Army, Lü Bu's Hezhou Army, Huang Fusong's Guanzhong Army, He Jin's Central Army, the Imperial Court's Border Army and forbidden army that could recruit habitual battles, except for the Youzhou Army, which was dragged by the Hu people, were all collected under the door, and the Liangzhou Army, the Hezhou Army, and the Central Forbidden Army gathered in Luoyang, and only the Chinese Regiment was in Guanzhong. However, Emperor Fusong had already given up his military power and was ordered to enter Beijing, and the Guanzhong Corps had been taken over by Dong Zhuo and reorganized. In just a few months, it was not difficult for Dong Zhuo to mobilize this army to the Kanto after taking over.
The strength of these troops alone is more than 100,000 people, all of whom are veterans of the battle, and for Dong Zhuo, it is simply a golden thigh, and it is an elephant's leg.
3, the Kwantung Shi clan rebelled, but in fact, the people's hearts were not aligned, Dong Zhuo held almost all the strong soldiers in the world. Any of the three roads of the Kwantung Coalition Army is the existence of Taishan. He controlled the most prosperous and wealthy Luoyang Basin of the Great Han Dynasty, which was a rich grain-producing area, and the national treasury was under the control of Dong Zhuo.
The so-called dong-dong coalition army was all a ragtag group temporarily recruited from the interior, and Sun Jian's troops could still be beaten.
If Dong Zhuo had immediately concentrated his army on a large army to suppress when he was guarding the various Kwantung groups, it would be very likely that he would break through the rebels in Henan, Hebei. It should be known that at that time, the Kanto Gunshou really participated in the discussion of Dong Dong, in fact, a small part.
As long as Dong Zhuo personally led a large-scale attack and took care of whoever rebelled, then the Kwantung rebels would also be spun up and destroyed, just like the three rebellions in Huainan against Sima Shi. As long as Dong Zhuo set aside enough places for the Kwantung scholars in the imperial court and did not usurp their power, it would not be difficult to stabilize the situation.
As a result, Dong Zhuo actually moved the capital to Chang'an, and then gave up his position as the central government. Moreover, moving the capital to Chang'an and abandoning the Kwantung Economic Zone is equivalent to walking on the road of economic collapse, obviously the opening card is so good, but it is going to the road of suicide...
4. Yuan Shao proposed to make Liu Yan emperor, but in fact he wanted to establish an alliance with Liu Yan to integrate the Kwantung. These two people are famous for their appeal and strength, if they join forces to integrate the Kanto, although there will be a lot of dissatisfaction, but it is very likely to control the four states of Hebei with thunder. Cao Cao, Yuan Shu, gongsun Zhan and the like could only bow down. Although the two of them will have to have a struggle sooner or later after the world is decided, at that time, the overall situation of the world has been decided. As a result, Liu Yan was too honorable and actually gave up. Yuan and Liu fought separately, one was actually destroyed by Gongsun Zhan, and the other was delayed for many years to fight Hebei, which was a pity.
5. Death of Sun Jian. At the beginning of the chaos at the end of the Han Dynasty, the world discussed military strength and ability to fight, in addition to Dong Zhuo's family, the only two that could fight were the Youzhou Border Army and Sun Jian's self-contained system. Yuan Shu and Sun Jian cooperated, with Nanyang County as the base to go south to Xiangyang, at that time Liu Biao's new entry, unstable foundation, people's trepidation, its inevitable defeat, once Liu Biao was defeated, Yuan Shu immediately entered Jingzhou, Jingzhou Yuzhou united into one, the world dispute took the lead. As a result, Sun Jian actually died unexpectedly, which was really dog blood...
6. Cao Cao fought the Battle of Zhang Xiu in Nanyang. As soon as Zhang Xiu surrendered, he was able to quickly and unabashedly integrate his subordinates to rebel, and if he looked at the refusal of Liu Zong and others in the face of a similar situation and some people proposed a plan, they knew that this was a super difficult thing. Cao Cao really almost handed over the ledger this time.
Cao Cao's closest to the end of the crisis three times, the loss to Xu Rong that time, Gunzhou to Lü Bu that time, and then Nanyang to Zhang Xiu this time, the first time Cao Cao died, it is estimated that in history is the goods of bandits Jia Yi. The second time he died, he was also a small prince who was not remembered by the Fans of the Three Kingdoms. The third time is the key, if Cao Cao dies in Nanyang, the original Central Plains overlord will be finished immediately.
If this is the case, it is a joke that Cao Cao left his name in the history books, and his great name will be laughed at together with the saying that "there can be beautiful women here". And Yuan Shao will be able to integrate the Kwantung at once, and the general trend of the world has been determined.
7. The death of Sun Ce. Sun Ce's Northern Expedition was based on evidence, to put it bluntly, Yuan Shao went south, Sun Ce went north as a friend of Yuan Shao's army, and how much strength did Cao Cao have to deal with Sun Ce? The key is how many people related to Yuan Shao in the Yuzhou generation want to waver?
Although Yuan Shao was Cao Cao's sworn enemy, it was precisely because of this that the weight of other chips was very important. Sun Ce Liu Bei Liu Bei is a chip on this game that may become the last straw.
History did not have Sun Ce's Northern Expedition, Cao Cao was all a thousand guns, and if Sun Ce launched the Northern Expedition again, it might not be the last straw. Of course, Sun Ce was too light as Sun Jian, but after all, he was the master of one party, and the luck factor of whether he could succeed in assassination was too great.
If Sun Ce took Shouchun, even if Yuan Shao took Yuzhou Qingzhou Gunzhou, it would be a big profit for him. And what everyone doesn't know is that Yuan Shaoyang's life expectancy is limited, if Yuan Shao dies and the Yuan clique splits up and begins to kill each other, then Sun Ce may really be able to do it.
8. Death of Yuan Shao. Although Yuan Shao was defeated at the Battle of Guandu, the foundation of Hebei was still there, and with the situation at that time, Cao Cao could not eat Hebei at all. At this time, Yuan Shao died, giving Cao Cao time to go north to break the Yuan clan. Many people evaluate Yuan Shao as a variety of incompetent clouds, in fact, Yuan Shao was a good villain who fought in the struggle for hegemony in the crowd, and the victory and defeat of Guandu was not a line difference. After the war, everyone was still evenly matched, and Yuan Shao's biggest inferiority to Cao Cao was actually lifespan.
Yuan Shao died, the Yuan clique was fragmented, what if Yuan Shao and Cao Cao lived in reverse? In the case of Cao Cao's clique at that time, I do not see that anyone could inherit Cao Cao's position, and if Cao Cao had died at that time, the Cao clique would have been divided into pieces, and Yuan Shao would have gone south again without any obstacles. Before the Battle of Guandu, Sun Ce died, Cao Cao could concentrate on fighting Against Yuan Shao, after the Battle of Guandu Yuan Shao died, Cao Cao was able to flatten Hebei, and after Liu Biao died after pinghebei, Cao Cao was able to go down to Jingzhou in one fell swoop.
The three waves of enemies, Sun Ce, Yuan Shao, and Liu Biao, were all enemies that Cao Cao could not help in his lifetime, and they all died early one by one, and they gave Cao Cao the opportunity to appear.
It felt like Cao Cao sometimes came to the same force in heaven and earth, but in an instant, the Battle of Chibi, the hero was not free, Providence? Personnel? In the dispute at the end of the Han Dynasty, there are too many accidents.
—— If you look at Sima Yi again, the final conclusion is still a sentence, living long enough is the king's way.