HistoryData
Historical ConflictYunnan

Battle of Northern Burma and Western Yunnan

Allied forces reopened the Burma Road supply route into China and expelled Japanese forces from northern Burma and western Yunnan by March 1945.

Duration & Scope

1943 1945

2 years

Estimated Total Casualties

110K

Key Facts

Duration
~1.5 years (Oct 1943 – Mar 1945)
Allied force strength
200,000–400,000 troops
Japanese force strength
90,000–150,000 troops
Allied casualties
Over 80,000
Estimated Japanese killed
Over 30,000

Strategic Narrative Overview

Beginning in December 1943, Chinese forces launched coordinated offensives from two directions: the Chinese Army in India advanced from the west into northern Burma, while the Chinese Expeditionary Force crossed the Salween River from Yunnan in the east. Supported by American advisers including Merrill's Marauders and British units, the Allies fought through difficult jungle terrain, engaging Japanese defensive positions over eighteen months of sustained combat.

01 / The Origins

Following Japan's conquest of Burma in 1942, the vital overland supply route from British India into China was severed, isolating the Chinese Nationalist war effort. The Allied campaign in northern Burma and western Yunnan was conceived to reopen the China-India Highway (Burma Road), restore supply lines to Nationalist China, and relieve pressure on Allied forces fighting Japan across multiple fronts in Southeast Asia.

03 / The Outcome

By late March 1945, Allied forces linked up at Muse, Burma, completing the overland connection and reopening the Burma Road. Japanese forces lost their northern Burma stronghold and were expelled from the west bank of the Salween River in Yunnan. The campaign restored a critical land supply corridor into southwestern China, significantly bolstering the Nationalist Chinese military capacity in the final phase of the war.

Belligerents & Mobilization Analysis

Side A

3 belligerents

China (Chinese Army in India & Chinese Expeditionary Force)United States (incl. Merrill's Marauders)United Kingdom
Peak Mobilized Forces~400K
Estimated Casualties~80K
Casualty Rate20.0%
Forces vs Casualties ratio
0CasualtiesMobilized
Key Commanders

Wei Lihuang, Joseph Stilwell.

Side B

1 belligerent

Japan (Burma Area Army)
Peak Mobilized Forces~150K
Estimated Casualties~30K
Casualty Rate20.0%
Forces vs Casualties ratio
0CasualtiesMobilized
Key Commanders

Masakazu Kawabe, Heitaro Kimura, Shinichi Tanaka.

Total Casualties (all sides)
110,000
Outcome
Allied victory; Burma Road reopened; Japanese expelled from northern Burma and western Yunnan

Location

Map of MyanmarMap of MyanmarMyanmar