On this day 99 years ago, on April 15, 1926 (March 4, 1926 in the lunar calendar), Feng Yuxiang retreated to Zhang Zuolin and entered Beijing. On April 15, 1926, Feng Yuxiang's national army withdrew from the Beijing-Tianjin line and retreated to the south. On March 20, Feng and his entourage departed from Pingdiquan in Suiyuan for the Soviet Union. However, the Zhifeng army did not give up the plan to destroy the national army because of Feng Xiano. On April 7, the Zhifeng army attacked North China from the north and south, and attacked the national army from Shandong, Henan and Zhili; Zhang Zongchang, Li Jinglin's Zhilu coalition army and Yan Xishan's Jin army attacked Beijing from east to west. The national army was in a critical situation. On April 15, they withdrew from Tianjin and Beijing one after another and retreated to the south line. On the same day, the Fengzhi coalition army entered Beijing. At the end of the month, the National Army gradually gave up Kaifeng, Zhengzhou and other places, and the main force retreated to the front lines of Inner Mongolia and Gansu. Beijing is under the complete control of Zhang Zuolin.