大陸打通作戦
With the rapid deterioration of the Chinese front, specifically the Nationalist forces, after Japanese launched Operation Ichi-Go in 1944, General Joseph Stilwell saw this as an opportunity to win his political struggle against Chiang Kai-shek, China's leader, and gain full command of all Chinese armed forces. He was able to convince General George Marshall to have President Franklin D. Roosevelt send an ultimatum to Chiang threatening to end all American aid unless Chiang "at once" placed Stilwell "in unrestricted command of all your forces."