What mistakes did Liu Bei make in the battle of Yiling in the Three Kingdoms that led to the fiasco?

In the battle of Yiling, Liu Bei made two fatal mistakes:

One is to abandon the water army.

Since the battle of Yiling, Liu Bei has been marching with the army. The army can support the army on land or fight together. The Yangtze River runs through the whole theater. At first, Liu Bei walked smoothly, hand in hand with land and water, until he reached Yiling.

But in Yiling, it was blocked by Lu Xun's dangerous terrain. In addition, it was midsummer, the climate was hot, the Yangtze River was hot and sunny. So Liu Bei ordered the water army to go ashore, give up the water army and camp in the dense forest for the summer.

Liu Bei gave up the water army, but Lu Xun did not. The Dongwu water army can go upstream and form an encirclement behind Liu Bei. Later, why Liu Bei was completely annihilated was a very important reason. If it is a face-to-face battle, Liu Bei will not be completely annihilated no matter how hard he fights, but being surrounded is different.

The second is to let the army camp in the dense forest.

When Liu Bei was stuck in Yiling, it was hot and hot, but Liu Bei made a fatal mistake. He asked all the soldiers to camp in the dense forest. Although it is cool in the dense forest, it is very hot in summer. What would Liu Bei do if Wu Dong's army set fire to it?

In Battle of Red Cliffs, Wu Dong defeated Cao Cao with fire. It took Liu Bei more than ten years to forget how Battle of Red Cliffs defeated Cao Cao, and how he camped in the dense forest to guard against enemy fire. Liu Bei fought all his life and made such a mistake.

Lu Xun took advantage of Liu Bei's two major mistakes. On the one hand, the water army was used to transport troops around the rear of Liu Bei, forming a siege. On the other hand, Lu Xun arranged for a large number of soldiers to carry flammable items to attack Liu Bei's soldier camp. Later, Liu Bei's troops camped in the dense forest were attacked by fire, and the sea of fire burned, and the whole forest burned. Of course, Liu Bei's barracks were burned down.

This led to Liu Bei's great rout, Liu Bei was forced to flee, and all his troops were attacked and wiped out.

As for Cao Pi's statement that Liu Bei made a mistake of 700 Li, this statement is not valid. Liu Bei doesn't have a camp of 700 Li, which is neither realistic nor possible. The so-called 700-mile camp refers to Liu Bei's arrangement of hundreds of outposts in front of 700 miles. Think about it and you will understand that there is not a 700-mile camp from Yong 'an to Yiling. How can it be seven hundred li?