The second phase of Ichi-Go began in May, following the success of the first phase. Japanese forces advanced southward and occupied Changsha, Hengyang, Guilin and Liuzhou. At the Defense of Hengyang, the Japanese only won a Pyrrhic victory since 17,000 Chinese soldiers held out against over 110,000 Japanese soldiers from June 22–August 8, 1944, inflicting 19,000-60,000 dead on the Japanese. In December 1944, Japanese forces reached French Indochina and achieved the purpose of the operation. Nevertheless, there were few practical gains from this offensive. US air forces moved inland from the threatened bases near the coast. The operation also forced British Commandos working with the Chinese as part of Mission 204 to leave China and return to Burma. The U.S. Fourteenth Air Force often disrupted the Hunan–Guangxi Railway between Hengyang and Liuzhou that had been established in Operation Ichi-Go. Japan continued to attack airfields where US air forces were stationed up to the spring of 1945.