彭越
In 214, Ma Chao defected from Zhang Lu's side to Liu Bei's forces, and he assisted Liu Bei in pressuring Liu Zhang to surrender and yield Yi Province to Liu Bei. When Guan Yu received news that Ma Chao (whom he was unfamiliar with) had recently joined them, he wrote to Zhuge Liang in Yi Province and asked him who was comparable to Ma Chao. Zhuge Liang knew that Guan Yu was defending the border (so he should not displease Guan Yu). He replied: "Mengqi is proficient in both civil and military affairs. He is fierce and mighty, and a hero of his time. He is comparable to Qing Bu and Peng Yue. He can compete with Yide, but he is not as good as the peerless beard."