Page "Zhang Fei" Paragraph 6

In 211, Liu Bei led an expedition force to Yi Province on the invitation of the governor Liu Zhang, leaving behind Zhuge Liang, Zhao Yun and Zhang Fei to guard Jing Province.

During that time, Zhang Fei and Zhao Yun filibustered Lady Sun from bringing Liu Bei's young son, Liu Shan, with her back to Sun Quan's territory.

In 212, Liu Bei officially declared war on Liu Zhang after he integrated Liu Zhang's forces stationed at Boshui Pass into his own.

Liu Zhang then hurriedly mobilized his remaining forces to intercept Liu Bei from getting to Chengdu, capital of his jurisdiction.

The following year, Zhang Fei, Zhao Yun and Zhuge Liang led separate forces from Jing Province to reinforce Liu Bei.