X Force
A Nationalist Chinese military force rebuilt in British India after the 1942 retreat from Burma and used in Allied operations to retake northern Burma and reopen the land route to China.
Last updated August 31, 2026
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Overview
X Force was the portion of the National Revolutionary Army's Chinese Expeditionary Force that reached British India after the Japanese conquest of much of Burma in 1942. The force had originally entered Burma from China's Yunnan Province at the request of Chiang Kai-shek, whose government sought to assist Britain in resisting the Japanese advance and to protect the Burma Road, the principal overland supply route connecting Allied aid with China. The campaign deteriorated rapidly, and the Chinese formations became separated during the retreat. One part withdrew toward India, while other Chinese formations returned toward Yunnan and later became associated with Y Force. The troops arriving in India were concentrated at Ramgarh Cantonment in Bihar Province, in what is now Jharkhand. Under an Anglo-American reorganization program, the force was expanded and rebuilt to a nominal five-division structure. Its formations were the New 30th, New 22nd, New 38th, 14th, and 50th Divisions. American personnel provided training and advice, while the British financed much of the re-equipment and support. The intention was to create Chinese units capable of sustained offensive operations against the Japanese in the difficult terrain of northern Burma, where supply, disease, roads, and communications posed severe obstacles. The five divisions were grouped into two armies. The New 30th and New 38th Divisions formed the New 1st Army, commanded by Sun Li-jen. The New 22nd, 14th, and 50th Divisions formed the New 6th Army, commanded by Liao Yaoxiang. The force is often described as totaling approximately 75,000 troops, although wartime establishment figures and actual field strength were not necessarily identical. X Force operated under the wider China-Burma-India command structure and became closely associated with General Joseph Stilwell's plans for an Allied offensive in northern Burma. Stilwell employed X Force as the principal Chinese spearhead of the advance intended to recover northern Burma and facilitate construction of the Ledo Road. That road was designed to replace the Burma Road as a land connection between the Allied logistical base in India and China. X Force's operations were therefore part of a larger strategic effort: restoring communications with China, tying down Japanese forces in mainland Asia, and improving the effectiveness of Chinese resistance. The force's military value was shaped not only by battlefield performance but also by the quality of its American-led training, access to modern equipment, and ability to operate within a multinational command and supply system. Sun Li-jen was the most prominent commander associated with X Force. His leadership of the New 38th Division received favorable notice from British commander William Slim, who later discussed Chinese formations and Allied operations in his memoir of the Burma campaign. X Force should not be confused with Y Force, the Chinese formations that operated from Yunnan and re-entered Burma from the east. Both belonged to the broader Chinese war effort against Japan, but they were organized, supplied, and deployed from different geographical bases. X Force was a wartime military formation rather than a commercial brand or continuing institution. Its historical significance lies in the modernization of selected Chinese units, the Allied campaign in northern Burma, and the effort to maintain China's participation in the war despite the interruption of the Burma Road. It ceased to exist as a distinct wartime formation after the end of the conflict and the dissolution or reorganization of the wartime command structures.
History
X Force originated in the wartime cooperation between Nationalist China and the British Empire after Japan expanded its offensive into Southeast Asia. In 1942, Chiang Kai-shek sent Chinese troops from Yunnan into Burma to assist British forces and protect the Burma Road. The operation could not prevent the Japanese advance, and the Chinese units became divided during the retreat. A substantial portion withdrew through difficult territory toward British India. These troops formed the nucleus of what became known as X Force. In India, the refugees from the retreat were assembled at Ramgarh Cantonment in Bihar Province. The Allied plan was not simply to preserve the surviving formations but to transform them into a more coherent and effective field force. The Chinese divisions were reorganized, expanded, trained, and re-equipped with American assistance. British authorities supported the program financially and administratively, while American instructors worked to improve tactics, logistics, communications, and the use of modern weapons. The resulting force was organized around five divisions: the New 30th, New 22nd, New 38th, 14th, and 50th. The divisions were grouped into two armies. The New 30th and New 38th formed the New 1st Army under Sun Li-jen. The New 22nd, 14th, and 50th formed the New 6th Army under Liao Yaoxiang. The overall establishment was commonly presented as approximately 75,000 troops. Actual strength varied according to casualties, replacements, illness, leave, and the practical limitations of wartime administration. X Force became a central component of General Joseph Stilwell's plan for the Allied campaign in northern Burma. Its role was to advance from India into Burma, pressure Japanese forces, and support the restoration of an overland logistical connection with China. The Ledo Road was intended to provide that connection after the Burma Road had been cut. The force therefore served both an operational and a strategic purpose: it was a combat formation, but it was also an instrument of Allied efforts to sustain Chinese resistance and keep Japanese forces committed in the China-Burma-India region. The rebuilding of X Force reflected the uneven nature of Allied support to China. American leaders hoped that selected Chinese divisions could be trained and equipped to modern standards, but the broader theater remained constrained by transport shortages, difficult terrain, and the limited capacity of the available supply routes. The disruption of the Burma Road made it impossible to provide all the equipment and munitions originally envisioned for a much larger modern Chinese force. X Force consequently represented a concentrated modernization effort rather than a complete transformation of the National Revolutionary Army. Sun Li-jen became the best-known Chinese commander associated with the force. His direction of the New 38th Division drew praise from British commander William Slim. X Force's operations also need to be distinguished from those of Y Force, the Chinese formations that entered or re-entered Burma from Yunnan. The two forces belonged to the same broader Chinese war effort but operated from different bases and under different logistical arrangements. X Force was a temporary wartime formation. Its identity was tied to the Burma campaign, the Allied command structure, and the emergency reconstruction of Chinese divisions in India. After the Second World War, the conditions that had created the force disappeared, and it no longer existed as a distinct formation.
- 1945
End of the wartime formation
[1]With the end of the Second World War, the temporary China-Burma-India command structure and X Force's distinct wartime role came to an end.
- 1942
Chinese forces enter Burma
[1]Chiang Kai-shek sent Chinese troops from Yunnan into Burma to support British forces and oppose the Japanese advance.
- 1942
Retreat into British India
[1]After the Allied position in Burma deteriorated, part of the Chinese expeditionary force retreated into British India and became the nucleus of X Force.
Ramgarh reorganization
[1]At Ramgarh Cantonment, the force was reorganized into five divisions and rebuilt through American training and British-supported re-equipment.
Formation of the New 1st and New 6th Armies
[1]The New 30th and New 38th Divisions formed the New 1st Army under Sun Li-jen, while the New 22nd, 14th, and 50th Divisions formed the New 6th Army under Liao Yaoxiang.
Products and positioning
A Chinese expeditionary force rebuilt in India and used as the Allied offensive spearhead in northern Burma during the Second World War.
Product categories. Military operations · Expeditionary and infantry formations · Training and combat support
Marketing campaigns
- 1942Burma campaign and retreat to India
Burma · British India
Chinese troops entered Burma to assist Britain against Japan. Following the collapse of the Allied position, part of the force retreated into India, where it was reorganized as X Force.
Outcome. The retreat removed the force from Burma but preserved a core that could be retrained and returned to the theater.
- Northern Burma offensive and Ledo Road advance
Northern Burma · India-China corridor
X Force served as the Chinese spearhead of General Joseph Stilwell's effort to drive through northern Burma and support the construction of the Ledo Road, an overland route intended to restore supplies to China.
Outcome. The campaign contributed to the reopening of an overland Allied connection toward China and demonstrated the capabilities of the rebuilt Chinese divisions.
Brand decisions
- Rebuild selected Chinese divisions in IndiaStrategy
Background
After the 1942 retreat from Burma, the Allies needed Chinese formations that could undertake offensive operations while the Burma Road was unavailable.
Action taken
The troops were concentrated at Ramgarh, expanded to five divisions, trained by American instructors, and re-equipped with British financial support.
Aftermath
The resulting X Force became a principal Chinese component of the Allied northern Burma campaign.
- Use X Force as the offensive spearhead in northern BurmaStrategy
Background
General Joseph Stilwell sought to recover northern Burma and create a land route from India toward China.
Action taken
X Force was assigned a leading role in the advance associated with the Ledo Road.
Aftermath
The force became closely identified with Allied efforts to restore a land connection to China and sustain Chinese resistance to Japan.
Sources4 sources
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