Lady Sun
In 211, Liu Bei led an army to Yi Province to assist the governor Liu Zhang in countering the advances of a rival warlord, Zhang Lu of Hanzhong Commandery. He left Zhang Fei and others behind to guard Jing Province in his absence. Earlier in 209, Liu Bei married Sun Quan's younger sister Lady Sun to strengthen the alliance between him and Sun Quan. Because of her brother's strong influence, Lady Sun was arrogant and she allowed her close aides to behave lawlessly. Even Liu Bei was afraid of her. When Sun Quan heard that Liu Bei had left for Yi Province, he sent a vessel to Jing Province to fetch his sister home. Lady Sun attempted to bring along Liu Bei's son Liu Shan with her, but Zhang Fei and Zhao Yun led their men to stop her and managed to retrieve Liu Shan.