In the third month of the seventh year of the Jian'an Era, just as spring plowing began, Liu Bei's army suddenly launched a northern campaign.
Liu Bei held Cao Cao in check in Hanzhong, while Qin Tian led his troops into Nanyang. By the beginning of the fourth month, they had reached Jiyang.
After arriving, Qin Tian ceased his advance in order to lure the Cao army westward. He directly established camp and waited for them.
Meanwhile, after receiving the news, Cao Ang followed Xun You's advice and led reinforcements including Li Tong, Cao Xiu, Lü Qian, Cao Chun, and Li Dian.
Upon reaching Wan City, Zhang Xiu came out to receive them. After briefly describing the current situation, he welcomed Cao Ang into the city.
Once inside, Xun You studied the map of Qin Tian's current route of advance and said to Cao Ang:
"Qin Tian is advancing along two routes. One is aimed at Wan County, while the other heads west. He likely intends to strike Wuguan Pass."
"A force should be dispatched to garrison it, lest Qin Tian open a route through Guanzhong and threaten Chang'an."
"Furthermore, Qin Tian currently has numerous troops and is full of crafty schemes. We cannot allow his army to reach the city walls."
"We may garrison Jiyang and block Qin Tian's northern route, while using cavalry to harass his supply lines."
"Once their provisions are exhausted, they will surely retreat. If we pursue at their heels, the enemy army will certainly fall into our hands."
After hearing Xun You's words, Cao Ang led his own twenty thousand troops together with Zhang Xiu's forces toward Jiyang.
Unexpectedly, just as his army reached Nanjùju, scouts reported that Qin Tian had already taken Jiyang and was advancing north.
Upon hearing this, Xun You hurriedly