1April-May, 945, was the eve of the complete victory of the world anti-fascist war. Mussolini and Hitler finished, and Germany surrendered unconditionally. When American troops landed in Okinawa, a decisive battle in Japan was imminent. In order to realize the strategic task of "expanding the liberated areas and narrowing the occupied areas", China launched a powerful "spring offensive" and "summer offensive" on the battlefield behind enemy lines, annihilating a large number of effective forces of the Japanese puppet troops. In order to defend the Yunnan-Guizhou-Sichuan strategic base area and better meet the needs of future counter-offensive operations, the Military Commission of the National Government downsized the troops under the jurisdiction of the Army Headquarters and established four front armies and 1 defense headquarters. At the same time, due to the opening of the China-India highway, a large number of American reinforcements were imported, and the equipment of the national government forces was further improved. 1In mid-February, 945, the CMC drafted the Outline of China Army's Operational Plan, and put forward the operational plans of "shifting the offensive to Guangxi, Hunan and Guangdong" and "attacking Yishan and Liuzhou, and joining forces with allied forces in Xijiang" to cooperate with allied forces in landing on the southeast coast.

At this time, the Japanese base camp also felt that its combat power was declining, its war ambition was depressed, and it was unable to control the vast land occupied by China. It proposed a plan to shorten the defense line and concentrate troops to prevent China from fighting back. 1945 On April 18, the Japanese base camp issued the "Continental Order" to reduce its troops in South China and concentrate its troops on important positions in North China and Central China. The third, thirteenth, thirty-fourth and twenty-seventh divisions that occupied Guangxi and Guangdong were dissolved from the eleventh and twenty-third armies and incorporated into the Chinese dispatch army (directly under the central government). The withdrawal of these troops is scheduled for July and August. However, with the development of the war situation, the Japanese invaders held a military meeting of senior generals in Dalian in early May and drew up a new plan to advance the withdrawal time from Guangxi to late May. The 1 1 Army of the Japanese Army stationed in Guangxi made specific arrangements for the evacuation time according to the evacuation instructions of the troops.