Yan Liang
For his efforts, Guan Yu was enfeoffed with the rank of marquis. However, thinking that by killing Yan Liang he had done Cao Cao a great service and repaid Cao Cao's generosity, Guan Yu left behind all he had received from Cao Cao with a note of parting and returned to Liu Bei. Cao Cao, in admiration of Guan Yu's loyalty, did not allow his generals to give pursuit.