When Liu Bei visited the thatched cottage three times to invite Zhuge Liang out, Zhuge Liang said that if he wanted to compete with Cao Cao for the world, he must capture Jingzhou and Yizhou. Liu Bei agreed with Zhuge Liang. So he focused on Liu Zhang.

Whether in the novel or in the official history, Liu Bei is known for his benevolence and righteousness and is deeply popular among the people. However, in the process of capturing Yizhou, Liu Bei's actions could not be called benevolent and righteous. It can even be said that Liu Bei's Yizhou was deceived and abducted from his own family, Liu Zhang. After capturing Yizhou, Liu Bei did not kill Liu Zhang, but instead exiled him to Jingzhou and handed him over to Guan Yu's custody. Later, Sun Quan defeated Guan Yu, and Liu Zhang fell into Sun Quan's hands. Sun Quan accused Liu Zhang of being a herdsman in Yizhou and hated Liu Bei. Liu Zhang eventually died of illness in the East. Wu.

Liu Bei spent the first half of his life wandering around. After the Battle of Chibi and Cao Cao retreated to the north, Liu Bei took the opportunity to seize part of Jingzhou and gain a foothold. However, Jingzhou was the site of the Fourth War and could not consolidate its roots deeply. In order to compete for the world, Liu Bei set his sights on Yizhou, which was rich and unharmed by war. At this time, the Yizhou Mu was Liu Zhang, who was weak and weak. Zhang Lu was originally a subordinate of the Yizhou Mu. At this time, he also established his own family and no longer obeyed the orders of Yizhou. In addition, Liu Zhang was close to the Dongzhou faction who followed his father to Sichuan. The Yizhou scholars were extremely dissatisfied with this, and the undercurrent in Yizhou was ready to move.

Liu Bei's army rushed to the gates of Chengdu and surrounded Chengdu. The Yizhou faction under Liu Zhang had no intention of accompanying Liu Zhang to death, and persuaded Liu Zhang to surrender. Finally, Liu Zhang surrendered dozens of days later, and Liu Bei sent Liu Zhang to Jingzhou for custody and took over his family's foundation. It can be said that most of Liu Bei's Yizhou was deceived from his own family, Liu Zhang.

This is undoubtedly a stain on Liu Bei, who is known for his benevolence and righteousness. Perhaps for this reason, Liu Bei did not kill Liu Zhang in the end, but instead used the tax revenue of several counties to support him.