Zhuge Zhan
When Deng Ai besieged Zhuge Zhan at Mianzhu, he offered the latter a chance to surrender and promised to recommend to the Wei government to enfeoff Zhuge Zhan as the Prince of Langye if he surrendered. However, Zhuge Zhan refused, had Deng Ai's messenger executed, and ordered his troops to prepare for battle outside the pass. He supposedly arranged his troops in the Eight Trigrams Formation invented by his father. At the time, there were other notable Shu figures with Zhuge Zhan at Mianzhu, including Zhang Zun (張遵; a grandson of Zhang Fei), Li Qiu (李球; an imperial guard commander), Huang Chong, as well as Zhuge Zhan's eldest son Zhuge Shang. After Huang Chong gave a speech to the Shu soldiers to boost their morale, both sides engaged in battle. Deng Ai ordered his son Deng Zhong (鄧忠) and another officer Shi Zuan (師纂) to flank Zhuge Zhan's position. They moved to the formation's left and right but the Shu forces intercepted them and drove them back; only Deng Ai's central force remained intact. When Deng Zhong and Shi Zuan complained that there was no way to break the formation and suggested that they retreat, Deng Ai angrily said that they must win if they wanted to live another day, and even threatened to execute anyone who spoke of retreat. Deng Zhong and Shi Zuan then led their men to attack the Shu formation again and succeeded in breaking it. Zhuge Zhan, Zhuge Shang, Zhang Zun, Li Qiu, Huang Chong and other Shu officers were killed in action.