 For Chinese militia who refused to switch their allegiance, the CPC would call them "collaborators" and then attack to eliminate their forces.For example, the Red Army led by He Long attacked and wiped out a brigade of Chinese militia led by Zhang Yin-wu in Hebei in June, 1939.In December 1940, Chiang Kai-shek demanded that the CPC's New Fourth Army evacuate Anhui and Jiangsu Provinces.