Background
Sun Jiao was the third son of Sun Jing, a younger brother of Sun Quan"s father Sun Jian.
Sun Jiao was the third son of Sun Jing, a younger brother of Sun Quan"s father Sun Jian.
Along with the rest of his family, Sun Jiao first served as a military general under Sun Ce (Sun Jian"s eldest son and successor) and then under Sun Quan (Sun Ce"s younger brother and successor). After the Battle of Ruxu in 213, his leadership skills were highly praised by all with whom he served. In reward for his deeds at Ruxu, he was chosen to succeed Cheng Pu as commander of Xiakou when Cheng was promoted to a higher position.
Once, while drinking with fellow commander Gan Ning, Sun Jiao made a comment under the influence of alcohol that deeply offended Gan, who sent a letter to Sun Quan requesting a transfer from Sun Jiao"s command to Lü Meng"son
Sun Jiao earned merits in the 215 campaign on Jing Province, in which Eastern Wu forces overran several of Liu Bei"s commanderies in the province. In 219, Sun participated in a second invasion of Liu Bei"s holdings in Jing Province.
When preparing for the battle, Sun Quan intended for Sun Jiao and Lü Meng to hold joint command over the military, much as his generals Zhou Yu and Cheng Pu had during the Battle of Red Cliffs. Lü Meng, however, advised Sun Quan against this arrangement, as it could lead to dissension in the ranks, and asked him to choose whomever he saw fit for the position.
In the end, Lü was chosen, and Sun Jiao participated under his command.
There is no record of Sun Jiao feeling slighted by this arrangement. Sun Jiao himself earned numerous merits in the campaign, but not long after Guan Yu"s execution, he himself died of sudden illness.