Here is an explanation to you of the reasons why Liu Bei and Zhang Fei parted ways:

In history, the time of Taoyuan rebellion and the Yellow Turban Rebellion were all in 184 AD, and it was not clear which month, but from the time when they were in full bloom, it should be March and April, and the beginning time of the Yellow Turban Rebellion was the fifth day of the third month, and now at this time, the Yellow Turban Rebellion began for three months, so now Liu Bei's three brothers have been married for two or three months, and history says that the three of them were married as soon as they met, so they have known each other for only two or three months.

It's not that I don't believe in the love of life and death between brothers, I just think that this kind of relationship must be precipitated over time, or shared hardships before it is possible. I believe that the relationship between these three brothers in history is definitely very sincere, but it is also a deep friendship that they have experienced for more than ten years or even decades, as well as countless tests of life and death.

There is no love in the world for no reason, and now the three of them have only been two or three months since they met, and they have not experienced the various tests that followed, so I think the relationship between them is not unassailable at this time. And at the beginning, Liu Bei and Zhang Fei and Guan Yu were purposeful, when he saw Zhang Fei and Guan Yu fighting on the street, he sighed that if he could get the help of these two individuals, then he would be much more likely to realize his ambitions.

And at this time, if he wants to save Zhang Fei, he can really only be forcibly killed by the three brothers, but in this way, they will become the rebellion of the imperial court, no matter what happens in the future, this will become a stain that cannot be washed away in his life, and he will always be able to fall into the grass, which is unacceptable for Liu Bei, who has great ambitions in his heart.

Also, I think among the Three Kingdoms, Liu Bei is the most ambitious person.

First of all, take Cao Cao as an example: Cao Cao did not show any ambition at the beginning, he just followed the trajectory of a second-generation official, and mixed in the officialdom of the late Han Dynasty step by step. It's just that at that time, he was still relatively naïve, and he was determined to be a capable minister and fight against the dark forces in the officialdom.

It wasn't until later that he emerged in the Yellow Turban Rebellion, and gradually became the overlord of the north in the later hegemony. His ambitions and goals are changing little by little with his own position, and he has always been trying to do the best in front of him.

And Liu Bei, when he first appeared, he was still a straw sandals seller, but such a person who sold straw sandals and couldn't even solve his own food and clothing problems, he actually showed his lofty ambition to support the Han family!

Hehe, maybe a mediocre person like me can't understand the idea of these heroes, anyway, I think if in reality there is a garbage picker or a street sweeper (there is absolutely no discrimination against them here, just a metaphor that they are much worse than some people in high positions in terms of ability). But I think they're much cleaner than those people in terms of character. Tell me he's going to be president, and I'm sure I'll think this guy is a lunatic.

I think that if a person's ambition exceeds his ability or status by a lot, then it is not called ambition, but ambition, although there are some crazy people who will eventually realize their ambition.

Actually, I don't like Liu Bei myself, but I can't say how much I hate it, but I still like the group of Wenchen generals under him very much, so in order to be able to let the protagonist subdue those people, I can only discredit Brother Xuande.