直皖戰爭
Domestic politics in China soon changed the situation dramatically. The invasion had caused alarm for Zhang Zuolin, the powerful warlord of Manchuria, who was upset that such a large army was moved so close to his territory. He joined the chorus of critics such as Cao Kun and Wu Peifu calling for the removal of the Anhui clique. In July, they forced President Xu Shichang to remove Xu Shuzheng from his position. In response, Xu Shuzheng moved the bulk of his forces to confront his enemies in China. Both he and Duan Qirui were defeated in the ensuing Zhili–Anhui War. This left only a few Chinese troops in Mongolia without their leadership.