After the Japanese invasion of Manchuria, and until 1933, large volunteer armies waged war against Japanese and Manchukuo forces over much of Northeast China. Due to Chiang Kai-Shek's policy of non-resistance, the Japanese were soon able to establish complete control. After the League of Nations refused to do more than voice its disapproval, the Manchurian Incident was perhaps over, for diplomats. Afterwards small guerrilla bands continued the fight. There were several of these armies: Besides these armies there were other forces under leaders like Lao Pie-fang and others.