LI YAN

'Li Yan' (李嚴) (155 – 234) was an officer who lived during the Three Kingdoms period of China's history. He is occasionally listed along with Ma Su and Wei Yan as one of Zhuge Liang's great failures in accurately reading people and gauging their abilities.
He was formerly an officer under Liu Zhang. He joined Liu Bei after the latter defeated Liu Zhang and captured Yizhou. Gradually rising up the ranks, he was appointed co-regent of Liu Shan (along with Zhuge Liang) by Liu Bei. Zhuge Liang claimed Li Yan's capability was on par with Lu Xun of the Kingdom of Wu. Over time, tensions occurred between Li Yan and Zhuge Liang, over Li Yan's growing desire for more recognition, and Zhuge Liang's dissapointment in Li Yan's abilities.
Entrusted with logistics, Li Yan failed to provide supplies during one of Zhuge Liang's Northern Expeditions. He also attempted to lie and cover up his failure, but was discovered. Stripped of his rank and banished, he died soon after in 234.