Investigations about the War against Japanese Invasion in Qahar

Japan carried out invasion policy and invaded China.It first established a Puppet Manchu Regime and occupied the northeast of China with force,and then it intended to occupy Rehe,Qahar and Suiyuan and set up a Mongol regime.Feng Yuxiang adhered to Sun Yat-sen's revolutionary policy of uniting Russia,uniting the communist party and supporting farmers and workers,organized anti-Japanese allied troops and achieved splendor military success.However,Jiang Kai-shek betrayed the three great policies and decided to attack Zhangjiakou and to force Feng Yuxiang stop the fight against the Japanese invaders.