In May 1942, the Chinese Expeditionary Force, which helped the British army fight against the Japanese army, failed in the battle of entering Myanmar. The Japanese army took advantage of the situation to invade the western Yunnan region of China, trying to seize the Huitong Bridge and the natural danger of crossing the Nujiang River, and invade the southwest rear of China. The Chinese defenders decisively bombed the Huitong Bridge and contained the Japanese army on the west bank of the Nu River.
In May 1942, the Chinese Expeditionary Force, which helped the British army fight against the Japanese army, failed in the battle of entering Myanmar. The Japanese army took advantage of the situation to invade the western Yunnan region of China, trying to seize the Huitong Bridge and the natural danger of crossing the Nujiang River, and invade the southwest rear of China. The Chinese defenders decisively bombed the Huitong Bridge and contained the Japanese army on the west bank of the Nu River.