The battle of Civil fort was a turning point in the history of Ming Dynasty, which had a great influence on the political system and military reform of Ming Dynasty. In fact, Emperor Yingzong's attitude on going out to battle by the emperor himself has always been a hot topic worthy of discussion. In this paper, the author thinks that Yingzong has a great initiative on expedition in person, not caused by Wang Zhen's instigation. The purpose of this paper is to point out the true facts of "imperial motivation and expedition ".