Japanese forces swept into northern China. China’s army led by Jiang Jieshi has no chance of wining against the better equipped and trained Japanese army. Not long after that, Beijing, other northern cities and capital, Nanjing, fell to the Japanese. Japanese troops then killed tens of thousands of soldiers and civilians. This action caused Jiang Jieshi to set up a new capital at Chongqing while Chinese guerrillas led by Communist leader, Mao Zedong, continued to fight the Japanese in the conquered area.