Chahar Province
Stripped of his military power, Feng spent the early 1930s criticizing Chiang Kai-shek's failure to resist Japanese aggression. On 26 May 1933, Feng Yuxiang became commander-in-chief of the Chahar People's Anti-Japanese Army Alliance, with Ji Hongchang and Fang Zhenwu as frontline commander. With a strength claimed by Feng of over 100,000 men, Ji Hongchang's army pushed against Duolun, and by July 1933 drove the Japanese and Manchukuoan troops out of Chahar Province. By late July Feng and Ji Hongchang established, at Zhangjiakou, the "Committee for Recovering the Four Provinces of the Northeast". Chiang Kai-shek, fearing that Communists had taken control of the Anti-Japanese Allied Army, launched a concerted siege of the army with 60,000 men. Surrounded by Chiang Kai-shek and the Japanese, Feng Yuxiang resigned his post and retired to Tai'an in Shandong.