Zhang Fei (-221 CE); courtesy name Yide; was a military general serving under the warlord Liu Bei during the Three Kingdoms period. He shared a close brotherly relationship with Liu Bei and Guan Yu; with Zhang Fei and Guan Yu being among the earliest of Liu Bei's supporters.

Zhang Fei fought in various conflicts for Liu Bei; helping to carve out the state of Shu Han. When Liu Bei declared himself emperor; Zhang Fei was promoted to 'Marquis of Xi District'. After Sun Quan's betrayal led to Guan Yu's death and the loss of Jing Province; Liu Bei launched a campaign against his erstwhile ally; ordering Zhang Fei to lead 10;000 troops to rendezvous with Liu Bei's main force. Zhang Fei was assassinated by his own subordinates during the the mobilisation though; who cut off his head and defected to Sun Quan's side.

In the historical novel 'Romance of the Three Kingdoms'; Zhang Fei was portrayed as an alcoholic and temperamental man; exceedingly loyal and formidable; but very impatient. He swore an oath of brotherhood with Guan Yu and Liu Bei in a peach garden; becoming closer than brothers.