After the Great Wall failed in the Anti-Japanese War, the Japanese army advanced to the border of Chahar and Jehol, threatening Zhangjiakou and then the west gate of Beijing and Tianjin. Feng Yuxiang, a former leader of the Northwest Army who lost his political position and lived in seclusion after the Central Plains War, decided to cooperate with underground organizations and use his influence in the former headquarters of the Northwest Army under the inspiration of national justice. Establish volunteers in Chahar to resist the Japanese army. 1932 10, Feng Yuxiang arrived in Zhangjiakou, Chahar Province, and expanded some of 29 army's reserve troops left in Chahar. Song, the commander of 29 army, was the headquarters of the Northwest Army and acquiesced in Feng Yuxiang's behavior. Soon, a large number of Northeast Volunteers who fled Jehol went to Feng Yuxiang for command, and many nationalist army headquarters, bandit groups and even mongolia local armed forces went to Feng Yuxiang for command.

1933 On May 24th, Feng Yuxiang announced the establishment of the "Chahar People's Anti-Japanese Coalition" and appointed Tong as acting chairman. Also secretly recruited a large number of * * * members to join the anti-Japanese Coalition. He also sent a telegram to expose the compromise policy of the national government and declare independence against the Japanese aggressors.

Naturally, the National Government could not tolerate such blatant "self-reliance" behavior. In addition, there are many factions and warlords in the National Government. Chiang Kai-shek is only a nominal leader, and the ministries of the Northwest Army in North China are semi-obedient to Chiang Kai-shek. Feng Yuxiang established the Northwest Army and dominated the northwest and north China for many years. Although the Northwest Army was disintegrated after the Central Plains War, Feng Yuxiang reorganized his armaments and put a large number of staff officers into his command. In addition, Feng allowed * * * to operate in the allied forces. It is a great threat to the central departments headed by Chiang Kai-shek. Chiang Kai-shek must get rid of Feng Yuxiang quickly. However, because the Great Wall just failed in the Anti-Japanese War and the allies shouted anti-Japanese slogans, the National Government did not dare to ban the allies immediately, so it had to publicly declare that it did not recognize the legal status of the allies, cut off all links between the mainland and Chahar Province, and prohibited bullets, grain and medicines from entering Chahar from the mainland, and ordered the Jinsui Army to concentrate in the northwest of Shanxi, while the Northwest Army and the Central Army concentrated in the north of Hebei Province to prepare for military encirclement and suppression. At the same time, a large number of people were sent to divide and buy off the allied ministries. With the further deepening of the crisis of the Chinese nation, China's anti-Japanese national salvation movement flourished. People from all walks of life in Nanjing, Shanghai, Beiping and Tianjin gathered in succession, demanding that the government actively resist Japan, recover lost ground and donate money to buy planes for the anti-Japanese army. The monks in Wutai Mountain organized the "Monks' Salvation Association" to train middle-aged brave men to participate in the Anti-Japanese War. Overseas Chinese also called for anti-Japanese. Under the influence of China people's strong demand for resisting Japan and saving the nation, and under the impetus of China, Ji Hongchang, Feng Yuxiang, Fang Zhenwu, etc. * * * * members, contact Chahar and other places for anti-Japanese troops. 1933 On May 26th, the Chahar People's Anti-Japanese Coalition was formally proclaimed in Zhangjiakou, with Feng Yuxiang as commander-in-chief, Fang Zhenwu as commander-in-chief of the former enemy and Ji Hongchang as commander-in-chief. The allied forces sent electricity to the whole country and advocated uniting all parties, factions and armies to jointly resist Japan.

The establishment of the Chahar Anti-Japanese Coalition has won the support and support of people from all walks of life in China. Many mass organizations, celebrities and senior generals have called Feng Yuxiang to express their support and congratulations. China * * * mobilized a large number of students and young people from Peiping, Tianjin and Taiyuan to join the anti-Japanese allied forces in Zhangjiakou, and the Mongolian people's anti-Japanese armed forces led by * * * also joined the allied forces. From the northeast, Jehol to Chahar, troops willing to resist Japan gathered under the banner of the allied forces, which made the allied forces rapidly grow to hundreds of thousands.