Pacific War - Japanese Offensive in India 1944

Japanese Offensive in India 1944

After the Allied setbacks in 1943, the South East Asia command was preparing to launch offensives into Burma on several fronts. In the first months of 1944, the Chinese and American troops of the Northern Combat Area Command, commanded by the American Joseph Stilwell, began extending the Ledo Road from India into northern Burma, while the XV Corps began an advance along the coast in the Arakan province. In February, the Japanese mounted a local counter-attack in the Arakan. After early success, this counter-attack was defeated when the Indian divisions of XV Corps stood firm, and relied on aircraft to drop supplies to isolated forward units until they could be relieved by reserve divisions.

The Japanese response to the Allied attacks was to launch an offensive of their own into India, across the mountainous and densely forested frontier. This attack, codenamed Operation U-Go, was advocated by Lieutenant General Renya Mutaguchi, the recently promoted commander of the Japanese Fifteenth Army, and was permitted to proceed by Imperial General Headquarters, despite misgivings at several intervening headquarters. The offensive was launched in mid-March. Although several units of the British Fourteenth Army were forced to fight their way out of encirclement, by early April they had concentrated around Imphal in Manipur state. A Japanese division which had advanced to Kohima in Nagaland cut the main road to Imphal, but failed to capture the whole of the defences at Kohima. During April, the Japanese attacks against Imphal failed, while fresh Allied formations drove the Japanese from the positions they had captured at Kohima.

As many Japanese had feared, their supply arrangements were inadequate to maintain their forces. Once Mutaguchi's hopes for an early victory were thwarted, his troops, particularly those at Kohima, starved. During May, while Mutaguchi continued to order attacks, the Allies were advancing southwards from Kohima and northwards from Imphal. The two Allied attacks met on 22 June, breaking the Japanese siege of Imphal. The Japanese finally broke off the operation on 3 July. They had lost over 50,000 troops, mainly to starvation and disease. It was the worst defeat suffered by the Japanese Army to that date.

Although the advance in the Arakan had been halted to release troops and aircraft for the Battle of Imphal, the Americans and Chinese had continued to advance in northern Burma, aided by the Chindits operating against the Japanese lines of communication. By the time campaigning ceased during the monsoon rains, the Americans had secured a vital airfield at Myitkyina, which eased the problems of the air resupply to China over The Hump.