Tang Shengzhi
Following the demilitarization conference in 1929, Li Zongren, Bai Chongxi and Huang Shaohong of the Guangxi clique broke off relations with Chiang in March 1929, which effectively started the confrontation between these commanders and the Nanjing government. In May, Feng Yuxiang of the Northwest Army also clashed with Chiang. In November, Li Zongren issued a declaration to form anti-Chiang coalition along with Wang Jingwei. In December, Tang Shengzhi and Zhang Fakui announced their support of the anti-Chiang coalition. The Nanjing government responded by expelling Wang Jingwei from the party for his participation in the anti-Chiang coalition. The coalition created a new KMT government in Beijing to show their defiance of the Nanjing government. In February 1930, Yan Xishan of the Shanxi clique demanded the resignation of Chiang from the KMT, which was refused. Later in the same month, Yan assumed the leadership position in the anti-Chiang coalition, with the assistance of Feng and Li while Zhang Xueliang chose to remain "loyal" to Chiang.