C2818 A Stalemate

How could this be? Why would the Imperial Court's army appear here? Shouldn't they be in the city in front of them, tightly defending, waiting for me to lead the army to attack them? Why would they appear here? Could it be that they were not the army of the Eighth Prince, but the army led by the First Prince and the Third Prince before they were defeated?

Wang Cheng's heart was filled with