The Battle of Mount Song (松山战役, in Japanese: "The Battle of Ramou" (拉孟の戦い)) in 1944 was part of a larger campaign in southwestern China during the Second World War. Chinese Nationalist forces aimed to retake the Burma Road. The Japanese Army in Southern Yunnan was at risk of being cut off from advancing British and American troops in Northern Burma. The Japanese Army aimed to block the highway for as long as possible. Constructing a series of tunnels and bunkers over a static two-year period they turned the mountain and its immediate environs into a fortress. Songshan (in Chinese) Matsuyama (in Japanese) blocked the road immediately behind the Salween River. Although the Chinese Nationalist Army crossed the river with light casualties and surrounded the Japanese garrison, they found that t