Bo Pi vs Guo Jia

Bo Pi, a minister of Wu, accepted bribes from the state of Yue during negotiations after Wu's victory over Yue. This led him to persuade King Fuchai of Wu to spare Yue rather than annex it, a decision that later contributed to Wu's destruction.

Bo Pi continued to undermine Wu's defenses by slandering loyal generals like Wu Zixu and providing intelligence to Yue. When Yue invaded Wu, Bo Pi's actions facilitated the fall of the Wu capital, leading to King Fuchai's suicide and Wu's annexation by Yue.

After Yue conquered Wu, King Goujian of Yue executed Bo Pi for his disloyalty to his own state. Goujian considered Bo Pi a treacherous minister who could not be trusted, ending his life as a traitor to both Wu and Yue.

Guo Jia presented the 'Ten Advantages and Ten Disadvantages' analysis, arguing that Cao Cao had the strategic edge over Yuan Shao. He also predicted Yuan Shao's indecisiveness and the eventual betrayal of his subordinates, contributing to Cao Cao's victory.

Guo Jia advocated for a swift campaign against the Wuhuan tribes in the north, despite the risks of a long march. The campaign succeeded, eliminating a threat to Cao Cao's rear and securing his northern frontier.

Guo Jia fell ill and died at the age of 37 during the return from the Wuhuan campaign. His early death deprived Cao Cao of a key strategist, and Cao Cao later lamented that Guo Jia's absence contributed to the defeat at Red Cliffs.