護国戦争
During the Xinhai Revolution in 1911, the Qing governor fled from Dihua (Ürümqi). A band of Yunnanese led by Yang Zengxin quelled the rebellion and established himself as the provincial leader. President Yuan Shikai recognized Yang as governor. Yang was one of the few who supported Yuan's attempt to become emperor. During the National Protection War, he purged officers who sympathized with the Yunnan clique's leader Cai E. After Yuan's death, he recognized whichever government ruled in Beijing and maintained an isolationist and neutrality policy which kept Xinjiang away from the upheavals experienced in the rest of China.