This is a story from Three Kingdoms. Huang Zhong, a veteran in the army of Shu, was one of its top five generals. Zhang He under Cao Cao had suffered one defeat after another. Cao Hong gave him a 5,000-strong army to attack Jiameng Pass. When Liu Bei learned this, he consulted with Zhuge Liang, his military advisor. Zhuge Liang said: "Zhang He is a distinguished generalof Cao Cao. Only Zhang Fei could defeat him." Thisirritated veteran Huang Zhong. Huang shouted: "Advi-sor has looked down upon me. I will get his head off andoffer it to you." Zhuge Liang prodded Huang again by saying, "Though you are valiant, I am afraid you are not Zhang He's match because you are too old." WhenHuang 'Zhong heard this, his gray hair angrily stood on end. He said, "Old as I am, I am able to open two bows and am full of vitality." Huang went down and got a big sword off the rack and performed with it. He took two hard bows off the wall and pulled them broken. ThenZhuge Liang said: "If you go, whom would you like to be your assistant?" Huang Zhong replied, "Veteran Yan Yan. If the two of us can not defeat Zhang He, my gray-haired head is yours." Liu Bei and Zhuge Liangwere very pleased. The veteran generals were ordered tofight Zhang He. When Huang Zhong and Yan Yan gotto Jiameng Pass, they laid a trap to defeat Zhang He.Then they used skillful tactics to take over Tiandang Mountain, the granary of Cao Cao's army. Later, they captured Dingjun Mountain. They reported back to Liu Bei and Zhuge Liang declaring a complete victory.