In the history of the Three Kingdoms period, Liu Bei, as the founding emperor of Shu Han, experienced countless wars and political struggles throughout his life. However, he also committed three major mistakes, with the most severe being his revenge-fueled campaign against the Eastern Wu Kingdom, ultimately leading to the depletion of his country's strength. This article will delve into these three mistakes and their impact on the history of Shu Han.

Firstly, decision-making mistake: abandoning the alliance with Wu to resist Cao. In the early stages of establishing Shu Han, Liu Bei formed an alliance with the Eastern Wu Kingdom to jointly resist the powerful forces of the Cao Wei Kingdom. However, after the Battle of Red Cliffs, Liu Bei gradually abandoned the alliance with Wu and adopted a confrontational strategy. This decision-making mistake led Shu Han to lose a powerful ally and fall into a helpless situation.

Secondly, strategic mistake: attacking the Eastern Wu Kingdom. After Guan Yu was killed by the Eastern Wu Kingdom, Liu Bei decided to avenge him by attacking Wu. However, this strategic decision was extremely erroneous. Firstly, Liu Bei overlooked the powerful strength of Wu and underestimated his enemy. Secondly, he did not fully assess the durability and consumption of the war, resulting in heavy losses for the Shu Han army.

Thirdly, tactical mistake: the Battle of Yiling. During the campaign against Wu, Liu Bei suffered a devastating defeat in the Battle of Yiling. This battle was not only a turning point in Liu Bei's personal career but also a pivotal moment in the history of Shu Han. The defeat at Yiling caused heavy losses to the Shu Han army, low morale, and depleted national strength. From then on, Shu Han gradually declined and ultimately fell under the hands of the Cao Wei Kingdom.

In conclusion, the three major mistakes committed by Liu Bei throughout his life, especially his revenge-fueled campaign against the Eastern Wu Kingdom, led to the severe depletion of Shu Han's national strength. These historical lessons teach us that we should carefully weigh the pros and cons when making decisions and avoid allowing personal emotions to influence the overall situation of the country. At the same time, we should also recognize that war is not the best solution to problems, and peaceful development is the fundamental path to long-term stability and prosperity for a country.

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