On this day, 99 years ago, September 17, 1926 (August 11, 1926, the lunar calendar), Feng Yuxiang took the oath of Wuyuan. Feng Yuxiang (first from left), Commander-in-Chief of the Allied Forces, and Liu Bojian (third from left), Deputy Minister of the General Political Department, at the oath meeting. On September 15, 1926, Feng Yuxiang returned to Wuyuan County, Suiyuan Province, where the General Command of the National Army was stationed. Feng Yuxiang and his party left Moscow by train on August 17 and set out for home. They were accompanied by Communist Party member Liu Bojian, Soviet consultant Usmanov and others. On September 3, Feng Yuxiang and his party arrived in Kulun. Feng Yuyang is determined to clean up the mess and get back together. When the scattered troops of the National Army heard that Feng Yuxiang had returned to the country, they all returned with guns. Feng Yuxiang convened a meeting in Wuyuan, including National Army generals Lu Zhonglin, Song Zheyuan, Fang Zhenwu, Gong Fukui, He Qigong, Shi Jingting, Sun Yue, Xu Yongchang, etc., as well as Yu Youren, executive members of the Central Committee of the Kuomintang, to discuss the national army's plans. Decided to establish a coalition of the National Army and elected Feng Yuxiang as commander-in-chief of the National Army and coalition forces. On September 17, the National Army held a swearing-in and flag-awarding ceremony in Wuyuan City. Feng Yuxiang announced the establishment of the National Army Joint Command and became the commander-in-chief of the coalition forces. Yu Youren presented the flag and supervised the oath as a standing member of the Central Executive Committee of the Kuomintang Party of China. More than 10,000 officers and soldiers from the First, Second, Third, Fifth and Sixth Armies of the National Army attended the ceremony. A flag-changing ceremony was also held at the oath meeting, replacing the five-color flag with the Qingtian Bairi flag. Feng Yuxiang announced on the spot that in order to show that the National Army was loyal to Sun Yat-sen's Three People's Principles and determined to send an expedition to the Northern Expedition, all officers and soldiers of the National Army joined the Kuomintang of China; and solemnly issued a declaration of oath to the whole country. The declaration stated: "Yu Xiang was originally a martial artist. He had been a soldier for half his life and had never learned anything. However, he did not measure himself and tried to save the country. However, he was short-sighted and did not have the gist of revolutionary methods. Therefore, he floated down to the wild, traveled far to the country, and even went to the Soviet Union. When he saw the world revolution, it reached a climax. China is part of the world. It is oppressed by foreign imperialism and domestic warlords. If we want to relieve this deep pain, we can only overthrow the oppression of imperialism and relieve the oppression of warlords." After the meeting, Feng Yuxiang and Yu Youren carried red flags and led all officers and soldiers to march on Wuyuan Street. After the swearing-in meeting, the General Command of the National Army Coalition Army was established. Lu Zhonglin was appointed Chief of Staff, He Qigong was appointed Secretary-General, Li Xingzhong was appointed Chief of Staff, Chen Lianfu was appointed Chief of Staff, Xu Tingyuan was appointed Chief of Military Affairs, Zhang Jiyong was appointed Chief of Military Law, Zhang Yunrong was appointed Chief of Internal Defense, Xue Dubi was appointed Chairman of the Finance Committee, Shi Jingting was appointed Minister of Political Department, Liu Bojian was appointed Deputy Minister of Political Department, and Usmanov was appointed as political and military adviser. At the same time, political staff were sent to each army to establish a political department. By the end of the month, more than 60,000 people from Feng Yuxiang's old troops scattered in various places had surrendered. The National Army was preparing to regain its military prestige and march towards Shaanxi and Gansu.