The Chahar People's Anti-Japanese Army consisted mostly of former Northwestern Army units under Feng Yuxiang, troops from Fang Zhenwu's Resisting Japan and Saving China Army, remnants of the provincial forces from Jehol, Anti-Japanese volunteers from Manchuria and local forces from Chahar and Suiyuan. Even the Japanese puppet Liu Guitang switched sides joining the army as did the Suiyuan bandit leader Wang Ying.