Killed Cai Yang

He set his serpent halberd and was just coming on when Guan Yu said, “Brother, wait a while. See me slay the leader of these that I may prove myself no traitor.”

“Well, if you are really true, prove it by slaying that leader, whoever he may be, before I have finished three rolls of the drum.”

Zhang Fei’s condition was accepted. Soon the attacking force was near enough to make out the leader to be Cai Yang.

Sword in hand Cai Yang rode at full speed, crying, “So I have found you, slayer of my nephew! I have a command to capture you and will execute it.”

Guan Yu made no reply. Raising his sword ready to strike, he moved out and the drums began to beat. Before a roll could be completed the fight was over, and Cai Yang’s head had rolled on the ground. His force scattered and fled. Guan Yu, however, captured the young ensign bearer and questioned him (Romance of the Three Kingdoms, Ch 28).