May,1938
Mao Zedong published his “Problems of Strategy in Guerrilla War Against Japan” and “On Protracted War,” in which he comprehensively analyzed the era in which the Sino-Japanese war took place and the basic characteristics of Japan and China, expounded the general principle for the protracted war of resistance,the strategic role of the anti-Japanese guerrilla warfare and the strategies and tactics of the people's war, made a scientific prediction on the development of the anti-Japanese war, and refuted the “theory of national subjugation,” the “theory of quick victory” and the erroneous ideas of belittling the guerrilla warfare. As brilliant classics on solving the problems in the anti-Japanese war by dialectical materialism and historical materialism, these two articles enriched and further developed Marxist military science. June Soong Ching Ling founded the China Defense League in Guangzhou and Hong Kong respectively, with the aim of publicizing the Chinese people's anti-Japanese movement among people of various countries as well as the overseas Chinese, collecting medicine and other materials and introducing medical teams organized by international friends to take part in rescue work in the anti-Japanese base areas behind the enemy lines.