When Zhuge Liang heard of the Wei army's arrival, he led his troops to Shanggui County to collect the harvest. Supposedly, without good coordination, Sima Yi's subordinates defied his order to defend their positions; a detachment of the Wei army went to attack the Shu forces, but were defeated, although accounts from the "Book of Jin" make no mention of a detachment being defeated, and records of the campaign in general tend to vary and prove unreliable. After getting the enemy out of the way, Zhuge Liang foraged for the early spring wheat that was available in the vicinity. Sima Yi's subordinates feared losing the wheat, but Sima Yi stated that "Zhuge Liang thinks too much and makes too little decisions. He'll definitely fortify his camp and defences first before coming to harvest the wheat. Two days is sufficient for me (to reach Shanggui County)." He indeed reached there within two days after travelling overnight. When Zhuge Liang and his men heard that Sima Yi was marching towards their position, they swiftly retreated instead of giving battle. Sima Yi commented: "I'm weary from travelling day and night. This is because I know what militarists covet. Zhuge Liang does not dare to remain near the Wei River. This is easy for me." Initially, the Wei emperor, Cao Rui, wanted to supply Sima Yi's army with the wheat in Shanggui County and had rejected a proposal to transport grain from Guanzhong to the frontline. However, Zhuge Liang's movements turned out to be quicker than Cao Rui anticipated; only a portion of the wheat produce in Shanggui County was left after the Shu army's harvesting. The Wei general Guo Huai then asserted his influence over local nomadic tribes and forced them to produce food supplies for the Wei army. The Wei army was thus able to gain access to food supplies without assistance from the central government in Luoyang.