太平洋战争爆发后，日本以其优势兵力迅速席卷了东南亚的大部分地区。1941年12月中旬，日本为了切断援蒋路线，逼迫蒋介石政府投降，便开始大举人侵缅甸。为了协助英国保卫缅甸，确保援华路线的畅通，蒋介石派遣中国远征军人缅作战，结果以中英联军的失败和缅甸的陷落而告结束 After the outbreak of the Pacific War, Japan rapidly swept most of Southeast Asia with its superior forces. In mid-December 1941, in order to cut off the line of aid to Chiang Kai-shek and force the Chiang Kai-shek government to surrender, Japan began a massive invasion of Myanmar. In order to help the United Kingdom defend Myanmar and ensure the smooth flow of assistance to China, Chiang Kai-shek dispatched a Chinese expeditionary force to fight Myanmar. The result ended with the failure of the Chinese-British coalition troops and the fall of Burma