The relationship between the frontal battlefield and the battlefield in the enemy's rear area during Anti-Japanese War

The national United Front against Japan based on the corporation between the Kuomintang and the Communist Party was the postulate of victory of the war against Japan. During the war, the frontal battlefield led by the Kuomintang and he enemy's rear area led by the Communist Party kept the relationship of relatively independent and mutual cooperation. The relatively relationship was represented that their armed forces fought according to their rout, military stratagem and principle severally. The relationship of mutual cooperation was embodied by strategic cooperation and the cooperation of campaign and fight. But there were active and passive cooperation in it.