Historically, Man Chong convinced Cao Ren to not withdraw by indicating that the flood was only temporary and would not last long. Man Chong also noted that Guan Yu's vanguard had already advanced to Jia (郏), yet his main force dared not follow, because he was afraid of being cut off from the behind and attacked from both sides. In 228, Man Chong participated in an unsuccessful three-way invasion on the state of Eastern Wu. Man Chong was also credited with the suggestion to build a new castle at a strategic location far away from the sea on Hefei, as to minimize the advantage of the Wu navy. Sun Quan invaded Hefei again in 233, but he was so hesitate to land that he just stayed on the boat for 20 days. When he did land, he was ambushed by Man Chong, and lost a few hundred men to him before getting back on boat and retreat. During 4th battle on Hefei of 234, Man Chong was responsible of the defense of the grand castle of Hefei (however, Man Chong was not physically there), though his suggestion to reinforce general Zhang Ying (who was commanding troops inside Hefei Castle) was rejected by Cao Rui, he managed to burn down the rams Wu forces assembled to seize the city. As a result, the Wu forces retreated before Cao Rui bought the main army to Hefei. During his later years, Man Chong was involved in the power struggle with Wang Ling, and eventually lost favour in court.