What is the spirit of great sacrifice saying?

The story of Liu Bei's revenge. Darjeeling is a Shaanxi opera. Shaanxi Opera is a great spiritual sacrifice, which mainly tells the story of Liu Bei's revenge for attacking Tachileik: Guan Yu was killed by Pan Zhang, the general of Wu. In order to avenge Guan Yu, Zhang Fei urged his men to make white robes and was assassinated. Liu Bei hated his guts, so he commanded 700,000 troops to personally expedition and avenge Wu Wei. When the soldiers arrived in Yidu, Huang Zhong was killed and the soldiers continued to attack Wu. Finally, they killed Pan Zhang and Ma Zhong, the generals of the State of Wu, and got revenge.