The Fall of Burma

Burma held a small part of Britain's attention in December 1941. Malaya and Singapore had the reinforcements, and Hutton had two divisions, the 17th Indian and the 1st Burma, with which to defend a country whose value to the Allies lay in one port, Rangoon, and one road, the Burma Road to China. The Japanese Fifteenth Army, about 35,000 men in two divisions at first, crossed the Thai frontier in January 1942 with a single objective in Japanese planning: to take Rangoon and close that route. Each side's calculation was shaped by geography. The Salween, the Bilin, the Sittang and the Irrawaddy offered the defenders successive lines, and the Japanese repeatedly left the roads and moved through the jungle on either flank to block the road behind them.

The Sittang Bridge on 23 February 1942 is the best-known event of the campaign, and historians have given it different weights. Louis Allen called its destruction the turning point of the first Burma campaign. The 17th Indian Division was reduced to 3,484 infantry, a little over 40 per cent of its establishment, and Wavell replaced Hutton and sent Alexander to command. Alexander's orders to hold Rangoon could not be carried out, and the army evacuated the port on 7 March and destroyed what it could. Louis Allen put the weight on Rangoon and the oil: once both were lost, in his judgement, the question was where the army would retreat to and not whether. The loss of Rangoon cut the Burma Road from the sea and left the army without a port.

The Chinese armies were a second force in the campaign and a separate command. Stilwell commanded the Chinese Expeditionary Force, formed from the Fifth Army and the New Sixth Army, and the 200th Division held Toungoo for about twelve days in March. At Yenangyaung in April the 38th Division relieved the 1st Burma Division. The capture of Lashio on 29 April cut the Chinese army's route home, and the Chinese forces divided: Du Yuming's Fifth Army tried to reach Yunnan and suffered heavily, while the 38th Division reached Imphal substantially intact. The Burma Corps reached Imphal in the middle of May, just before the monsoon, after a retreat of about 1,000 miles.

The sources for the campaign disagree on several dates and figures. Accounts differ on the day Victoria Point was occupied and on the day the Japanese were halted at the Salween, and the casualty totals for the Allied armies, the Chinese armies and the refugees are estimates that vary widely.

Four rivers lay between the Japanese frontier and Rangoon: the Salween, Bilin, Sittang and, farther north, the Irrawaddy. Each looked suitable for defence, but the British and Indian formations were thinly spread across a country where roads and railway bridges determined how quickly troops could move. Japanese columns attacked along those routes and sent detachments through the jungle to reach the crossings behind the defenders.

At Moulmein the 2nd Burma Brigade withdrew across the Salween. The 17th Indian Division then fought at the Bilin before falling back toward the Sittang. On 23 February Major General Smyth ordered the railway bridge demolished with much of his division still on its eastern bank. Thousands escaped across the river, but most guns and vehicles did not. The division reached the western bank too weak to restore the line protecting Rangoon.

Thomas Hutton began the campaign with two divisions and responsibility for a frontier stretching from Tenasserim to the approaches to Rangoon. Iida Shōjirō could concentrate his Fifteenth Army on taking the port. After the destruction of the Sittang bridge, Wavell replaced Hutton with Harold Alexander, who inherited instructions to hold Rangoon despite the collapse of its southern defences. William Slim subsequently led the Burma Corps north through Yenangyaung toward India.

Chinese troops formed a second Allied force under a different national command. Stilwell sought to coordinate the expeditionary armies with the British; the Chinese 200th Division held Toungoo and Sun Li-jen’s 38th Division helped relieve troops at Yenangyaung. When Lashio fell, the forces divided. Some Chinese formations attempted the mountain route into Yunnan, while the 38th Division and Stilwell’s party went west toward India. Their withdrawal followed a different route from Slim’s.

Japanese bombers struck Rangoon on 23 and 25 December 1941, threatening the port through which supplies reached China. P-40 fighters of the American Volunteer Group and RAF Brewster Buffalos intercepted them, although Allied claims of aircraft destroyed require comparison with Japanese records. Air defence helped keep the port functioning, but aircraft could not replace the infantry, vehicles and reserves needed to hold the Sittang and the road north.

At Yenangyaung British M3 Stuart tanks and artillery supported the Chinese effort to open an escape route for the surrounded Burma Division. Tanks depended on fuel, ammunition and passable crossings, which were increasingly scarce during withdrawal. The British destroyed facilities they could no longer defend: the Sittang bridge in February, port installations at Rangoon in March and the Yenangyaung oilfields in April. Denial of those resources also narrowed the Allies’ remaining options.

Rangoon’s bombing and the Japanese advance drove Burmese residents, Indian migrants and colonial employees onto routes toward India. Many travelled beside retreating troops; others took mountain tracks without reliable food, shelter or medical care. The approaching monsoon made swollen rivers and exposure more dangerous. The retreat was therefore a civilian emergency as well as the collapse of a military defence.

At least 500,000 refugees are estimated to have reached India, while estimates of deaths along the way range from roughly 10,000 to 50,000. Colonial evacuation arrangements treated Europeans, Eurasians and Indians unequally, and available transport failed to meet the need. The refugees’ arrival added to the work of supplying exhausted troops and rebuilding forces along the Indian frontier.

After the Sittang crossing, the 17th Indian Division had 3,484 infantry and only a fraction of its equipment. The Burma Corps later escaped encirclement at Yenangyaung with Chinese assistance, but arrived in India after a retreat of roughly 1,000 miles with most of its transport lost. The fall of Rangoon removed the main port, while the capture of Lashio closed the road by which supplies had travelled to China.

Published Allied casualty estimates vary because British, Indian, Burmese and Chinese formations withdrew by different routes and were counted in different records. Refugee losses are still less certain. The campaign’s costs included the destruction of installations, the collapse of a transport network and the displacement of hundreds of thousands of civilians, alongside the dead, wounded and missing in the armies.

S. Woodburn Kirby’s British official history provides the main chronology for the river battles, command changes and withdrawal. The U.S. Army’s China–Burma–India history records Stilwell’s mission and the Chinese formations; Slim’s Defeat into Victory provides a commander’s retrospective account. These sources differ on some dates and casualties, especially in the Chinese retreat.

Archival photographs document bomb damage at Rangoon, the destroyed Sittang bridge and the demolitions at Yenangyaung. Their captions require care: a publication date is not always the date a photograph was taken, and an image of a destroyed bridge cannot establish the moment it was blown. Such records are evidence of places and consequences, alongside the written operational histories.