 However, by the time Myitkyina was captured, Allied success in the Pacific theatre was reducing the significance of the China-Burma-India theatre.Intending to coordinate with the X Force, Wei Lihuang's Chinese Expeditionary Force in Yunnan, known as the Y Force, crossed the Salween River in April and launched an offensive against the Japanese Army.By January 1945, the Y Force had captured the town of Wanting on the China-Burma border and regained control of the land route from Burma to China.