Wu Peifu
In June 1924, Jiang reestablished the Chinese Socialist Party, and in January 1925 renamed it the New Social Democratic Party of China. In the Northern Expedition, Jiang cooperated closely with the Beiyang General Wu Peifu, who fought against Chiang Kai-shek's National Revolutionary Army. After the defeat of Wu Peifu to Chiang Kai-shek, Jiang was publicly criticized by the Kuomintang. In the face of public opposition Jiang dissolved his party and escaped to Canada.