At the Beginning of the Northern Expedition with 80,000 Elite Troops, How Could We Lose?

In the two-hundred-year battle between Wei and Xuan, both sides plundered the people's power, both hoping to achieve unification. The common ancestors of both sides watched the massacre of their descendants from the nine heavens and felt happy... Until Tianci commander Xiao Tianci gathered 80,000 elite soldiers for the northern expedition, Wei Yunzhou followed the general trend and felt heroic. Why didn't the man take Wu Gou and capture the fifty states in Guanshan? The great cause of the Northern Expedition is now! No one wins all the time!