Wu Peifu was admired as a "Revolutionary general" in the period of the May Fourth Movement. But after only a few years, in the period of the National Revolution, he became the biggest counter revolutionary, and was defeated by the National Revolutionary Army. What brought about this military-political fall of Wu Peifu? By introducing the idea of a 'Strategy of Unifying China' and inquiring into changes in it, this essay attempts to answer this question. The author's conclusions are as follows: The Wang Chonghui 王寵惠 cabinet which Wu Peifu supported collapsed at the end of November 1922. This was the result of the coup d'etat in which Cao Kun, Wang Chengbin 王承斌 and Feng Yuxiang 馮玉祥 formed a united front against Wu Peifu. The collapse lead to a change in the strategy. And this change brought about a complete retrogression of the Cao Kun-Wu Peifu faction into a warlord faction of old type
