In February 1942, General Lo Cho-ying directed 5th Army to move from western Yunnan to the vicinity of Toungoo and further south in Burma. Advanced elements of the 200th Division of 5th Army arrived at Toungoo on March 8, 1942 and took over defensive positions from the British forces. The 6th Army was directed to move from Kunming to the Burma–Thai border. Its leading elements reached Mawchi, Mongpang and Mongtong in mid March. The 66th Army later arrived in Lashio and Mandalay as a reserve and to assist the British forces in their operations.
Battles of Yunnan-Burma Road Campaign:
Hsu Long-hsuen and Chang Ming-kai, History of The Sino-Japanese War (1937–1945), 2nd Ed., 1971. Translated by Wen Ha-hsiung, Chung Wu Publishing; 33, 140th Lane, Tung-hwa Street, Taipei, Taiwan Republic of China.
Jon Latimer, Burma: The Forgotten War, London: John Murray, 2004.