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In the spring of 213, Liu Zhang sent Liu Gui, Ling Bao, Zhang Ren, Deng Xian, Wu Yi and other officers to stop him at Fu. However all were soundly defeated and had to retreat to Mianzhu. They were killed or captured by Liu Bei's forces. Despite being the most trusted vassal of Liu Zhang, Wu Yi soon changed allegiance, Li Yan and Fei Guan were sent to help them at Mianzhu, but they surrendered to Liu Bei as well. Liu Bei's army was getting stronger and he sent commanders to pacify the other prefectures. Among them were Zhuge Liang, Zhang Fei, Zhao Yun. They led their army and pacify Baidi Jiangzhou and Jiangyang. Only Guan Yu stayed behind to defend Jing province.