郭淮
Zhuge Liang moved towards the Wuzhang Plains and prepared to cross to the north side of the Wei River. Sima Yi sent Zhou Dang () into position at Yangsui (陽遂; the area north of the Wei River in present-day Mei and Fufeng counties, Shaanxi) and to lure Zhuge Liang to attack him. Zhuge Liang did not mobilise his troops for several days. Sima Yi said, "Zhuge Liang wants to take control of the Wuzhang Plains and won't advance towards Yangsui. His intention is obvious." He then sent Hu Zun () and Guo Huai to defend Yangsui. Several days later, when Guo Huai received news that Zhuge Liang was planning to launch an attack in the west, his subordinates wanted to strengthen the defences in that area. Guo Huai was the only one who recognised that it was a ruse, and that Zhuge Liang was actually planning to attack Yangsui. He was proven right later when the Shu forces attacked Yangsui at night. However, as Guo Huai had set up defences earlier, the Shu forces failed to capture Yangsui. Zhuge Liang could not advance further so he retreated to the Wuzhang Plains.