In the last year of the Qin Dynasty, Liu Bang and Xiang Yu launched a battle for the world, and Xiang Yu's initial strength was obviously higher than Liu Bang's, so he trapped him in Bashu in Hanzhong, but what Xiang Yu did not expect was that Liu Bang later broke through the Three Qin Defense Line, came east, and finally won the world. And just over 400 years later, in the same place, Liu Bang's descendant Liu Bei also occupied Bashu in Hanzhong and established the Shu Han regime, but ultimately failed.
First of all, the first point is that Liu Bang and Liu Bei encountered different opponents in their own times. Liu Bang's opponent is Xiang Yu, and Xiang Yu is an invincible figure on the battlefield, but he is much worse in terms of strategy, it can be said that Xiang Yu is destined to be only the overlord, but he cannot be an emperor. But Liu Bei's opponents are different, Liu Bei's biggest opponents in the later period are Wei and Wu, and none of these two opponents is a simple role.
For example, Cao Cao of the State of Wei, which was a great military figure throughout history, Liu Bei himself and Cao Cao were still one level worse than Cao Cao, thanks to the help of Zhuge Liang, they would not be completely crushed, and even had to unite with Eastern Wu to resist Cao Cao, so the difficulty of Liu Bei wanting to complete the great cause of reunification was still very high.
There is also some difference between the actual situation encountered by Liu Bang and Liu Bei, first of all, Liu Bang, when Liu Bang rose, the world was still scattered. In particular, Xiang Yu also adopted a sub-feudal system, which led to the fact that there were princes everywhere, and Xiang Yu also declared himself the overlord of Western Chu, so although Liu Bang's strength was not as good as Xiang Yu', he could achieve victory through various breakthroughs.
On the other hand, Liu Bei was much more miserable, at that time Cao Cao had eliminated Yuan Shao, almost completely unified the north, the strength was very strong, even after the fiasco of Chibi, Cao Cao did not hurt the fundamentals, but chose to recuperate, still the strongest side of the force. Coupled with Liu Bei's occupation of Jingzhou in Eastern Wu, this obviously made Eastern Wu very uncomfortable, so he would be attacked by Eastern Wu later, and guan Yu was also damaged. Therefore, Liu Bei's forces were in a state of instability.
Therefore, Liu Bei wants to complete the great cause of unifying the world, or full of many limitations, not only the opponent he faces is very strong, but he cannot expand on the territory, and even Zhuge Liang, who is like a god, has repeatedly failed, so Liu Bang can seize the world, and Liu Bei can only sigh helplessly.