夷陵の戦い
Fa Zheng and Zhuge Liang did not share the same moral beliefs but they had a good working relationship because of their common goal, which was to serve Liu Bei well. Zhuge Liang was very impressed with Fa Zheng's brilliance. In 221, before the Battle of Xiaoting, many of Liu Bei's subjects advised their lord against going to war with his former ally, Sun Quan, who seized Jing Province from Liu in 219 and executed Liu's general Guan Yu. Liu Bei ignored them and proceeded with his campaign against Sun Quan. In the following year, he lost to Sun Quan's forces at the Battle of Xiaoting and had to retreat to Baidicheng, where he died in 223. Zhuge Liang sighed, "If Fa Xiaozhi was still alive, he could have prevented our lord from going on this eastern campaign; even if our lord did go on this campaign, he wouldn't have ended up in this disastrous situation (if Fa Xiaozhi was with him)."