Ma Su
In 228, when Zhuge Liang, the Imperial Chancellor of Shu, launched the first of a series of military campaigns against Shu's rival state Cao Wei (founded by Cao Cao's son Cao Pi), Wang Ping served as a subordinate of the Shu general Ma Su, who led the vanguard force to attack the enemy at the Battle of Jieting. As Ma Su's subordinate, Wang Ping advised his superior against camping on top of a hill away from water sources. Although Ma Su rejected Wang Ping's idea, he still put Wang Ping in command of a detachment of troops and let him set up a camp below the hill. As Wang Ping foresaw, the Wei general Zhang He led his troops to cut off the Shu army's access to water sources and surround them on the hill.