Yu Jin

Yu Jin, courtesy name Wenze, was a Chinese general who served under the warlord Cao Cao during the end of the Han dynasty. He joined Cao Cao in 192 around the start of the civil wars leading to the collapse of the eastern Han dynasty, and fought in many of the campaigns which established his position as a central figure in the period. In 219, Yu Jin was tasked with leading forces to relieve Cao Cao's general Cao Ren, who was being besieged in Fancheng by Liu Bei's general Guan Yu, but his armies were destroyed in a flood due to heavy rains. Yu Jin surrendered to Guan Yu and became a prisoner-of-war, but was transferred to the custody of another warlord, Sun Quan, after Sun Quan's forces captured Guan Yu's bases in late 219.