South-East Asian theatre of World War II

Japan attacked British and American territories with near-simultaneous offensives against Southeast Asia and the Central Pacific on 7/8 December 1941. Action in this theatre ended when Japan announced an intent to surrender on 15 August 1945. The formal surrender of Japan ceremony took place on 2 September 1945.

History

Outbreak of hostilities

Conflict in this theatre began when Japan invaded French Indochina in September 1940 and rose to a new level following the Attack on Pearl Harbor, and simultaneous attacks on the Philippines, Hong Kong, Thailand, Singapore and Malaya on 7 and 8 December 1941. The main landing at Singora (now Songkhla) on the east side of the Isthmus of Kra preceded the bombing of Pearl Harbor by several hours.

Although Japan declared war on the United States and the British Empire, the declaration was not delivered until after the attacks began. On 8 December, the United Kingdom, the United States, Canada, and the Netherlands declared war on Japan, followed by China and Australia the next day.

Initial Japanese successes

The Allies suffered many defeats in the first half of the war. Two major British warships, HMS Repulse and HMS Prince of Wales were sunk by a Japanese air attack off Malaya on 10 December 1941. Following the invasion, the government of Thailand formally allied itself with Japan on 21 December. Japan invaded Hong Kong in the Battle of Hong Kong on 8 December, culminating in surrender on 25 December. January saw the invasions of Burma and the Dutch East Indies and the capture of Manila and Kuala Lumpur.

Malaya and Singapore

Japanese forces met stiff resistance from III Corps of the Indian Army, the Australian 8th Division, and British units during the Battle of Malaya, but Japan's superiority in air power, tanks and infantry tactics drove the Allied units back. After being driven out of Malaya by the end of January 1942, Allied forces in Singapore, under the command of Lieutenant General Arthur Percival, surrendered to the Japanese on 15 February 1942; about 130,000 Allied troops became prisoners of war. The fall of Singapore was the largest surrender in British military history.

The Japanese Indian Ocean raid

The Japanese Indian Ocean raid was a naval sortie by the Fast Carrier Strike Force (Kidō Butai ) of the Imperial Japanese Navy from 31 March to 10 April 1942 against Allied shipping and bases in the Indian Ocean. Following the destruction of the ABDACOM forces in the battles around Java in February and March, the Japanese sortied into the Indian Ocean to destroy British seapower there and support the invasion of Burma. The raid was only partially successful. It did not succeed in destroying Allied naval power in the Indian Ocean but it did force the British fleet to relocate from British Ceylon to Kilindini at Mombasa in Kenya, as their more forward fleet anchorages could not be adequately protected from Japanese attack. The fleet in the Indian Ocean was then gradually reduced to little more than a convoy escort force as other commitments called for the more powerful ships. From May 1942, it was also used in the invasion of Madagascar — an operation aimed at thwarting any attempt by Japan to use bases on the Vichy French controlled territory.

In 1942, Madras City was attacked by a Mitsubishi Rufe, (the Zero's seaplane version) operating from the carrier Ryūjō which dropped a single bomb near the St. George Fort. The physical damage was negligible, though the public response was major and the city was evacuated because of fears of subsequent Japanese bombing and invasion. Many rich families from Madras moved permanently to the hill stations in fear.

Also in 1942 in preparation for a possible Japanese invasion of India, the British began improvements to the Kodaikanal-Munnar Road to facilitate its use as an evacuation route from Kodaikanal along the southern crest of the Palani Hills to Top Station. Existing roads then continued to Munnar and down to Cochin where British ships would be available for evacuation out of India.

Japanese occupation of the Andaman and Nicobar Islands

The Andaman and Nicobar Islands (8,293 km² on 139 islands) are a group of islands situated in the Bay of Bengal at about 780 miles from Kolkata (known at the time as Calcutta), 740 miles from Chennai (known at the time as Madras) and 120 miles from Cape Nargis in Burma. On 23 March 1942 a Japanese invasion force seized the islands and occupied them until the end of the war.

On 29 December 1943, political control of the islands was theoretically passed to the Azad Hind government of Subhas Chandra Bose. Bose visited Port Blair to raise the tricolour flag of the Indian National Army. After Bose's departure the Japanese remained in effective control of the Andamans, and the sovereignty of the Arzi Hukumat-e Hind was largely fictional. The islands themselves were renamed "Shaheed" and "Swaraj", meaning "martyr" and "self-rule" respectively. Bose placed the islands under the governorship of Lt Col. A. D. Loganathan, and had limited involvement with the administration of the territory.

Burma Campaign

• The retreat of the Burma Corps
• The formation of the British Fourteenth Army (The "Forgotten Army")
• The Arakan Campaign
• The Japanese attack on India
• The Allied counter offensives
  • Road to Rangoon
  • Brigadier Orde Wingate and the Chindits

US forces in the China Burma India Theatre

• Northern Combat Area Command (NCAC)
• Flying Tigers
• Fourteenth Air Force
• Tenth Air Force
• Twentieth Air Force (Operation Matterhorn)
• The Allied logistical airlift from India into China over the Hump
• The Ledo Road
• Merrill's Marauders

One of the major logistical efforts of the war was "flying the Hump" over the Himalayas and the building of the Ledo Road from India to China as a replacement for the Burma Road.

Air war in South East Asia

• RAF Far East Air Force
• RAF Third Tactical Air Force
• Bombing of South-East Asia (1944–45)

RAF battle honours:

• CEYLON 1942

Qualification: For operations against Japanese aircraft and naval units by squadrons based in Ceylon during the Japanese attacks of April 1942.

• BURMA 1944–1945

Qualification: For operations during the 14th Army's advance from Imphal to Rangoon, the coastal amphibious assaults, and the Battle of Pegu Yomas, August 1944 to August 1945.

Indian Ocean naval campaigns 1942–1945

The earliest successes were gained by mine laying and submarine warfare. The Japanese minesweeping capability was never great, and when confronted with new types of mines they did not adapt quickly. Japanese shipping was driven from the Burmese coast using this type of warfare. British submarines based in British Ceylon operated against Japanese shipping.

It was only after the war in Europe was clearly coming to an end that large British forces were dispatched to the Indian Ocean again. Following the neutralisation of the German fleet in late 1943 and early 1944, forces from the Home Fleet were released, and the success of Operation Overlord in June meant even more craft could be sent, including precious amphibious assault shipping.

During late 1944, as more British aircraft carriers came into the area a series of strikes were flown against oil targets in Sumatra, such as Operation Meridian. USS Saratoga was lent for the first attack by the United States. The oil installations were heavily damaged by the attacks, aggravating the Japanese fuel shortages due to the American blockade. The final attack was flown as the carriers were heading for Sydney to become the British Pacific Fleet.

After the departure of the main battle forces the Indian Ocean was left with escort carriers and older battleships as the mainstay of its naval forces. Nevertheless, during those months important operations were launched in the recapture of Burma, including landings on Ramree and Akyab and near Rangoon.