Answer
Zhuge Liang, the esteemed strategist, served as Wei Yan's superior during the Northern Expeditions. Wei Yan, a formidable general known for his valor and military prowess, played a crucial role in Zhuge Liang's campaigns against the rival Wei state. Under Zhuge Liang's command, Wei Yan executed daring maneuvers and achieved significant victories, contributing to the overall success of the Northern Expeditions.