Ledo Road - Construction

Construction

On December 1, 1942, British General Sir Archibald Wavell, the supreme commander of the Far Eastern Theatre, agreed with American General Stilwell to make the Ledo Road an American NCAC operation. The Ledo Road was intended to be the primary supply route to China and was built under the direction of General Stilwell from the railhead at Ledo (Assam, India) to Mong-Yu road junction where it joined the Burma Road. From there trucks could continue on to Wanting on the Chinese frontier, so that supplies could be delivered to the reception point in Kunming, China. Stilwell's staff estimated that the Ledo Road route would supply 65,000 tons of supplies per month, greatly surpassing tonnage then being airlifted over the Hump to China. General Claire Lee Chennault, the USAAF Fourteenth Air Force commander, thought the projected tonnage levels were overly optimistic and doubted that such an extended network of trails through difficult jungle could ever match the amount of supplies that could be delivered with modern cargo transport aircraft.

The road was built by 15,000 American soldiers (60 percent of whom were African-Americans) and 35,000 local workers at a cost of US$150 million. 1,100 Americans died during the construction, as well as many more locals. As most of Burma was in Japanese hands it was not possible to acquire information as to the topography, soils, and river behaviour before construction started. This information had to be acquired as the road was constructed.

General Stilwell had organized a 'Service of Supply' (SOS) under the command of Major General Raymond A. Wheeler, a high profile US Army engineer and assigned him to look after the construction of the Ledo Road. Major General Wheeler, in turn, assigned responsibility of base commander for the road construction to Colonel John C. Arrowsmith. Later, he was replaced by Colonel Lewis A. Pick, an expert US Army engineer.

Work started on the first 103 mile (166 km) section of the road in December 1942, followed a steep, narrow trail through territory from Ledo, across the Patkai Range through the Pangsau Pass, nicknamed "Hell Pass" for its difficulty, and down to Shingbwiyang, Burma. Sometimes rising as high as 4,500 feet (1400 m), the road required the removal of earth at the rate of 100,000 cubic feet per mile (1800 m³/km). Steep gradients, hairpin curves and sheer drops of 200 feet (60 m), all surrounded by a thick rain forest was the norm for this first section. The first bulldozer reached Shingbwiyang on 27 December 1943, three days ahead of schedule.

The building of this section allowed much-needed supplies to flow to the troops engaged in attacking the Japanese 18th Division, which was defending the northern area of Burma with their strongest forces around the towns of Kamaing, Mogaung, and Myitkyina. Before the Ledo road reached Shingbwiyang, Allied troops (the majority of whom were American-trained Chinese divisions of the X Force) had been totally dependent on supplies flown in over the Patkai Range. As the Japanese were forced to retreat south, the Ledo Road was extended. This was made considerably easier from Shingbwiyang by the presence of a fair weather road built by the Japanese, and the Ledo Road generally followed the Japanese trace. As the road was built, two 10 cm (4 inch) fuel pipe lines were laid side by side so that fuel for the supply vehicles could be piped instead of trucked along the road.

After the initial section to Shingbwiyang, more sections followed: Warazup, Myitkyina, and Bhamo, 372 miles (600 km) from Ledo. At that point the road joined a spur of the old Burma road and, although improvements to further sections followed, the road was passable. The spur passed through Namkham 439 miles (558 km) from Ledo and finally at the Mong-Yu road junction, 465 miles (748 km) from Ledo, the Ledo Road met the Burma Road. To get to the Mong-Yu junction the Ledo Road had to span 10 major rivers and 155 secondary streams, averaging one bridge every 2.8 miles (4.5 km).

For the first convoys, if they turned right, they were on their way to Lashio 100 miles (160 km) to the south through Japanese-occupied Burma. If they turned left, Wanting lay 60 miles (100 km) to the north just over the China-Burma border. However, by late 1944, the road still did not reach China; by this time, tonnage airlifted over the Hump to China had significantly expanded with the arrival of more modern transport aircraft.

In late 1944, barely two years after Stilwell accepted responsibility for building the Ledo Road, it connected to the Burma Road though some sections of the road beyond Myitkyina at Hukawng Valley were under repair due to heavy monsoon rains. It became a highway stretching from Assam, India to Kunming, China 1,079 miles (1736 km) length. On January 12, 1945, the first convoy of 113 vehicles, led by General Pick, departed from Ledo; they reached Kunming, China on February 4, 1945. In the six months following its opening, trucks carried 129,000 tons of supplies from India to China. Twenty-six thousand trucks that carried the cargo (one way) were handed over to the Chinese.

As General Chennault had predicted, supplies carried over the Ledo Road at no time approached tonnage levels of supplies airlifted monthly into China over the Hump. In July 1945, the last full month before the end of the war, 71,000 tons of supplies were flown over the Hump, compared to only 6,000 tons using the Ledo Road; the airlift operation continued in operation until the end of the war, with a total tonnage of 650,000 tons compared to 147,000 for the Ledo Road. By the time supplies were flowing over the Ledo Road in large quantities, operations in other theaters had shaped the course of the war against Japan.

There was a mile sign at the start of the Ledo Road with the following information:

When flying over the Hukawng Valley during the monsoon, Mountbatten asked his staff the name of the river below them. An American officer replied, "That's not a river, it's the Ledo Road."