Before Zhuge Liang came out of the mountain, an article "Longzhong Dui" had been three points in the world, and its strategic thinking and vision were beyond doubt. Zhuge Liang, on the other hand, was slightly lacking in specific implementation and was too conservative in commanding campaigns, such as the battle of Qishan.
And Pang Tong is a tactician, commanding campaigns and executing them first-class. It's a pity that he died too early and failed to develop his real talents. Otherwise, his ability and Zhuge Liang can complement each other, and Liu Bei would not be so miserable.
Zhuge Liang has just defected to Liu Beishi. Liu Bei once said that he got Zhuge Liang like a duck to water, and they were inseparable. But after Zhuge Liang showed his strength in Liu Bei's military clique, Liu Bei began to be wary of him.
Therefore, in the later period, Liu Bei gradually alienated Zhuge Liang and had reservations about many of Zhuge Liang's opinions. For example, he ignored Zhuge Liang's dissuasion and launched the war of Yiling, which eventually became the fuse of his downfall.
Besides, the timing for Liu Bei to get these two men is not very good. At that time, Cao Wei occupied seven points of the world, and his advisers were like a cloud. Sun Quan was also in Hedong, with four governors and twelve tiger ministers under his command. Strategy is important, but hard power is more important. As the weakest party, it is very difficult for Liu Bei to unify the world.
The most important thing is that the development of Shu Han did not follow the policy orientation of Longzhong. Guan Yu's private attack on Wei led to the fall of Jingzhou, a strategic place, and Liu Bei launched the war of Yiling for revenge, which was very irrational and beyond Zhuge Liang's control.
After the deaths of Fazheng and Guan Yu, Shu Han began to decline, but after the deaths of Liu Ba and Liu Bei, Zhuge Liang was unable to support himself and eventually exhausted.