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| South East Asia Command | |
|---|---|
 Insignia of the South East Asian Command | |
| Active | 1943–1946 |
| Country |  United Kingdom |
| Type | Command |
| Garrison/HQ | Kandy, British Ceylon |
| Insignia | |
| Flag |  |
South East Asia Command (SEAC) was the body set up to be in overall charge of Allied operations in the South-East Asian Theatre during the Second World War.
The initial supreme commander of the theatre was General Sir Archibald Wavell while head of the short-lived American-British-Dutch-Australian Command (ABDACOM) which was dissolved after the fall of Singapore and the Dutch East Indies. On 30 March 1942 the Joint Chiefs of Staff issued instructions naming General Douglas McArthur as commander-in-chief of the South West Pacific Area, which was made responsible for the water areas of the South China Sea, Borneo, and Java.
In August 1943, the Allies created the combined South East Asian Command, to assume overall command of air, sea and land operations in the theatre. In August 1943, with the agreement of the Combined Chiefs of Staff, Winston Churchill appointed Admiral Lord Louis Mountbatten as Supreme Allied Commander South East Asia. US Army General Joseph Stilwell was appointed deputy supreme commander. Stilwell was also, officially, deputy to Chiang Kai Shek, as Allied commander in China, and commanded all US forces across both theatres (which were known in the US as the China Burma India (CBI) Theater). Meanwhile the British Army commander in India, Auchinleck as Commander-in-Chief, India, provided vital base support.
Mountbatten arrived in India on 7 October [1] and SEAC came formally into being in Delhi at midnight on 15/16 November. [2]
SEAC headquarters moved in April 1944 to Kandy in Ceylon. [3]
From the outset, Western Allied forces available for the wider war against Japan were limited – by an overall Allied commitment towards defeating Nazi Germany, before the Empire of Japan. This was especially the case for the UK, and major advances were not anticipated in Asia until mid-late 1944 at least – that is, not until the defeat of Germany had become inevitable. [4]
A strategic focus by the Western Allies on the Central Pacific (i.e. the "Pacific Ocean Areas" in contemporaneous Allied terminology) and the South-West Pacific, resulted from compromises reached at the Casablanca Conference. UK participants were focused on Nazi Germany, and saw the war against Japan being limited "to the defense of a fixed line in front of those positions that must be held". [5] However, because such an approach was unacceptable to the United States, it was agreed that there would be offensive actions in Burma, operations in support of China, and other activity beyond holding a defensive line in South East Asia, as a result of US demands that the Japanese be kept off-balance, throughout any areas in which they might encounter Allied forces. [6] Nevertheless, for the Western Allies, the South East Asia theatre, China, and the North Pacific (including Alaska), [7] were destined to become secondary theatres, relative to efforts in the Pacific Ocean Areas, in which the supreme commander was US Admiral Chester Nimitz. Some saw SEAC as an organization for recapturing colonial possessions. The British also sometimes appeared to be more interested in liberating their own Asian possessions than the Americans did. This led Washington to try to distance itself from SEAC politically. [8]
On 2 December 1943, the Combined Chiefs of Staff officially approved in principle a plan designating the Pacific Ocean Areas as the focus of the main effort against Japan. Their reasoning was that advances in the Central Pacific were the most rapid route towards sustained, direct attacks on the Japanese Home Islands – e.g. subjecting Tokyo and other major cities to attacks by strategic bombers. A secondary line of advance – by US and Australian forces – "along the New Guinea-N.E.I.-Philippine axis", was to be controlled by the separate South West Pacific Area command under Douglas MacArthur (US Army).
The initial land forces operational area for SEAC was India, Burma, Ceylon, Malaya, northern islands of Sumatra, and, for offensive operations, Siam (Thailand). On 15 August 1945 (VJ-Day) this was expanded to include the rest parts of Dutch East Indies and southern part of French Indochina.
Command arrangements in SEAC were always complicated. Ideally there should have been under the Supreme Commander a Commander in Chief for each of the land sea and air forces. This was implemented for the naval and air forces (including the establishment of Air Command, South East Asia) but the British 11th Army Group, under SEAC itself, controlled only British land forces. US and Chinese forces serving in the South East Asian theatre, organised as the Northern Combat Area Command or NCAC commanded by Stilwell, answered directly to the Supreme Commander because Stilwell refused to serve under the 11th Army Group commander George Giffard. [9] The Eleventh Army Group had the Fourteenth Army on the Burma front, and the British garrison in Ceylon under its direct command. Stilwell also served as Chief of Staff to Chiang Kai-shek, who was officially the Supreme Allied Commander in China. Air Chief Marshal Sir Richard Peirse was appointed the Air Commander in Chief under Mountbatten. Air units taking part in the Burma Campaign were, at first, part of either the RAF Third Tactical Air Force or the USAAF Tenth Air Force. Tenth Air Force came under SEAC only through Stilwell as commanding General CBI Theater. To avoid a potentially cumbersome chain of command and overlapping effort Mountbatten gave orders in December for the two air forces to be integrated under the name Eastern Air Command. The US Fourteenth Air Force, which was based in China and the US Twentieth Air Force – strategic bomber units based in India – were never controlled by SEAC but their operations were coordinated with SEAC. At sea, the command structure was relatively simple, since the Royal Navy was providing almost all naval forces in the area. Admiral Sir James Somerville, Commander-in-Chief, Eastern Fleet, became the naval commander under Mountbatten. [10]
It was not until late 1944 that the land forces chain of command was clarified, after Stilwell was recalled to Washington. His overall role, and the CBI command were then split among three people: Lt Gen. Raymond Wheeler became Deputy Supreme Allied Commander South East Asia; Maj. Gen. Albert Wedemeyer became Chief of Staff to Chiang, and commander of US Forces, China Theater (USFCT). Lt Gen. Daniel Sultan was promoted, from deputy commander of CBI to commander of US Forces, India-Burma Theater (USFIBT) and commander of the NCAC. The 11th Army Group was redesignated Allied Land Forces South East Asia (ALFSEA) under a new commander Lieutenant-General Oliver Leese who had relinquished command of the Eighth Army in Italy, and NCAC (which by this time included Chinese, American and British units) was placed under ALFSEA. [11] As the drive to liberate Burma began in earnest however, Chiang Kai-shek and Wedemeyer made increasing demands for NCAC's formations to be moved to the China Theatre to meet the threat of Japanese attacks from the north. Once the Burma Road from Mandalay to Chungking was secured NCAC became passive and in March 1945 Mountbatten agreed to the US and Chinese troops in NCAC being gradually withdrawn to the China. [12]
RAF aircraft destined for SEAC had the word "SNAKE" applied after the serial during ferrying to prevent them being appropriated by other commands along the route.
In February 1945 Air Marshal Keith Park was appointed Allied Air Commander of South-East Asia Command [SEAC] where he served until the end of the war.
Once most of Burma was re-captured by Fourteenth Army, the command turned its attention towards its next major operational objective: Malaya. However, the use of atomic bombs on the Japanese mainland brought the war to an abrupt end.
The borders of SEAC were adjusted in the aftermath of the war, and its emphasis shifted from combat operations to military government. French Indochina was added, along with Borneo – most of which had already been captured by Australian forces, under the South West Pacific Command – and Java. The command became responsible for over 128 million people, with at least 120,000 of them still under Japanese custody. [13] This added immensely to its problems. At the same time, Western governments expected SEAC to re-establish colonial regimes in territories lost to Japan in 1941–45 where nationalist, anti-colonial forces had gained strength.
After Japan's surrender, Lt. General Itagaki Seishiro, who commanded the Japanese Seventh Area Army in Southeast Asia, were sent to Tokyo to stand trial for war crime. His soldiers who guarded the Jurong and Changi prisons in Singapore became captives of their former Allied prisoners. The British soon put these captives to work filling bomb craters, cleaning toilets, and cutting grass. They marched to their work sites each morning and back to their prisons at night. There were bouts of violence targeting former Japanese soldiers, but there were also offers of help to those Japanese civilians that were still waiting to be repatriated. [14]
Food shortages were everywhere. Requisitions by the Japanese military during the war had encouraged the hoarding but discouraged the growing of rice. Migrations to urban areas, where rations were rumored to be more available, worsened the situation. In Kuala Lumpur, Pahang, Kelantan, Trengganu, and Singapore, over 20 per cent of children were undersized or malnourished for their age. The British tried to bring in as much food as they could, but the system of rationing soon broke down. Prices soared, and a black market for British military ration flourished. Rising inflation was made worse after the British demonetized the Japanese occupation currency. A wave of strikes swept Singapore, led by Communist leaning labour unions and hundreds of thousands their members. [15]
British Commonwealth troops were landed in the Dutch East Indies (Indonesia) and French Indochina to facilitate the return of forces from the pre-war colonial powers. The formation deployed to the East Indies was the Indian XV Corps under command of Lieutenant General Sir Philip Christison, which included 5th Indian Infantry Division, 23rd Indian Infantry Division and 5th Parachute Brigade. [16] Military government was soon established in Burma, Malaya, Singapore and British Borneo. Sarawak and Sumatra did not prove to be major headaches for the British, except that one Japanese unit in Borneo refused to surrender until November 1945.
Thailand, although it had officially been an ally of Japan, quickly resumed both its independence and its ties with the western powers.
Because of shortages of personnel, some use was made of Japanese Surrendered Personnel (JSP) in these areas. The Allies found that their war-time allies in the Viet Minh in Indochina, and Indonesian nationalist forces in the East Indies, were well armed, well-organised and determined. It was intended that British forces would temporarily enforce military government over a small section of Indochina, because of local resistance, logistics and French sensibilities. However, in the end the commander of British forces declared de facto military government, to make it possible for French forces to return.
Aided by armed militias formed by the Japanese during the occupation, Indonesian nationalists in Java declared the Dutch East Indies a republic, and independent from the Netherlands. The British intended that the Dutch colonial administration should return, and assisted a small military contingent, the Netherlands Indies Civil Administration (NICA). However they initially avoided significant conflict with the nationalists. It was only possible for British forces to establish military government in parts of Indonesia, and they found that the location of Allied prisoners of war – and civilians interned by Japanese forces – were sometimes used by nationalists in bargaining for political ends.
British troops found themselves in increasing conflict with the nationalists. The nationalists attacked JSP garrisons awaiting repatriation, to seize their arms. A British Brigadier, A. W. S. Mallaby, was killed, as he pushed for the nationalists to surrender their weapons. As a result, on 10 November 1945, Surabaya was attacked by British forces, leading to the bloody Battle of Surabaya. The city was secured later that month. The battle for Surabaya was the bloodiest single engagement of the Indonesian National Revolution (1945–49). However, the British were reluctant to devote their scarce resources to a defence of Dutch interests, and withdrew from Indonesia.
As 1946 drew on, under its second and final commander, Lieutenant-General Montagu Stopford (June to November 1946), SEAC discharged its final tasks and was disbanded. It was no longer felt that a joint command was needed in the area.
Joseph Warren "Vinegar Joe" Stilwell was a United States Army general who served in the China Burma India Theater during World War II. Stilwell was made the Chief of Staff of the Chinese Nationalist Leader, Chiang Kai-shek. He spent the majority of his tenure striving for a 90-division army trained by American troops and equipped with American lend-lease and fighting to reclaim Burma from the Japanese. His efforts led to friction with Chiang who viewed troops not under his immediate control as a threat and who saw the Chinese communists as a greater rival than Japan. An early American popular hero of the war for leading a column walking out of Burma pursued by the victorious Imperial Japanese Armed Forces, his implacable demands for units debilitated by disease to be sent into heavy combat resulted in Merrill's Marauders becoming disenchanted with him. The U.S. government was infuriated by the 1944 fall of Changsha to a Japanese offensive. Stilwell delivered a message to the Chinese Nationalist leader, Chiang Kai-shek from President Roosevelt that threatened that lend-lease aid to China would be cut off. The resulting friction atop an already tense relationship made Ambassador Patrick J. Hurley advocate that Stilwell had to be replaced. Chiang had been intent on keeping Lend-Lease supplies to fight the Chinese Communist Party, but Stilwell had been obeying his instructions to get the Communists and the Nationalists to co-operate against Japan.
The Cairo Conference, also known as the First Cairo Conference, was one of 14 summit meetings during World War II, which took place on November 22–26, 1943. The Conference was held at Cairo in Egypt between China, the United Kingdom and the United States. Attended by Chairman Chiang Kai-shek, British Prime Minister Winston Churchill and US President Franklin D. Roosevelt, it outlined the Allied position against the Empire of Japan during World War II and made decisions about post-war Asia.
Supreme Allied Commander is the title held by the most senior commander within certain multinational military alliances. It originated as a term used by the Allies during World War I, and is currently used only within NATO for Supreme Allied Commander Europe and Supreme Allied Commander Transformation.
The 11th Army Group was the main British Army force in Southeast Asia during the Second World War. Although a nominally British formation, it also included large numbers of troops and formations from the British Indian Army and from British African colonies, and also Nationalist Chinese and United States units.
Merrill’s Marauders (named after Frank Merrill) or Unit Galahad, officially named the 5307th Composite Unit (Provisional), was a United States Army long range penetration special operations jungle warfare unit, which fought in the Southeast Asian theater of World War II, or China-Burma-India Theater (CBI). The unit became famous for its deep-penetration missions behind Japanese lines, often engaging Japanese forces superior in number.
The Northern Combat Area Command (NCAC) was a subcommand of the Allied South East Asia Command (SEAC) during World War II. It controlled Allied ground operations in northern Burma. For most of its existence, NCAC was commanded by United States Army General Joseph "Vinegar Joe" Stilwell. In 1945 after Stilwell was recalled, his deputy, Lieutenant General Daniel Sultan, was promoted to and assumed command.
The Burma campaign was a series of battles fought in the British colony of Burma. It was part of the South-East Asian theatre of World War II and primarily involved forces of the Allies against the invading forces of the Empire of Japan. Imperial Japan was supported by the Thai Phayap Army, as well as two collaborationist independence movements and armies. Nominally independent puppet states were established in the conquered areas and some territories were annexed by Thailand. In 1942 and 1943, the international Allied force in British India launched several failed offensives to retake lost territories. Fighting intensified in 1944, and British Empire forces peaked at around 1 million land and air forces. These forces were drawn primarily from British India, with British Army forces, 100,000 East and West African colonial troops, and smaller numbers of land and air forces from several other Dominions and Colonies. These additional forces allowed the Allied recapture of Burma in 1945.
The South-East Asian Theatre of World War II consisted of the campaigns of the Pacific War in the Philippines, Thailand, Indonesia, Indochina, Burma, India, Malaya and Singapore between 1941 and 1945.
China Burma India Theater (CBI) was the United States military designation during World War II for the China and Southeast Asian or India–Burma (IBT) theaters. Operational command of Allied forces in the CBI was officially the responsibility of the Supreme Commanders for South East Asia or China. In practice, U.S. forces were usually overseen by General Joseph Stilwell, the Deputy Allied Commander in China; the term "CBI" was significant in logistical, material and personnel matters; it was and is commonly used within the US for these theaters.
General Albert Coady Wedemeyer was a United States Army commander who served in Asia during World War II from October 1943 to the end of the war. Previously, he was an important member of the War Planning Board which formulated plans for the invasion of Normandy. He was General George C. Marshall's chief consultant when in the spring of 1942 he traveled to London with General Marshall and a small group of American military men to consult with the British in an effort to convince the British to support the cross channel invasion. Wedemeyer was a staunch anti-communist. While in China during the years 1944 to 1945 he was Chiang Kai-shek's Chief of Staff and commanded all American forces in China. Wedemeyer supported Chiang's struggle against Mao Zedong and in 1947 President Truman sent him back to China to render a report on what actions the United States should take. During the Cold War, Wedemeyer was a chief supporter of the Berlin Airlift.
![<span class="mw-page-title-main">GHQ India</span> Headquarters of the [British] Indian Army](https://upload.wikimedia.org/wikipedia/commons/thumb/2/2e/GHQ_India.svg/320px-GHQ_India.svg.png)
General Headquarters, India was the headquarters of the Commander-in-Chief, India, who commanded the British military forces in India, including the British Indian Army, after the Kitchener Reforms of 1903. It succeeded Headquarters, India which was the term in use initially after the three Presidency armies had been amalgamated into one force. The Commander-in-Chief answered to the civilian Viceroy of India.
General Sir George James Giffard, was a British military officer, who had a distinguished career in command of African troops in the First World War, rising to command an Army Group in South East Asia in the Second World War.
The Chinese Expeditionary Force was an expeditionary unit of China's National Revolutionary Army that was dispatched to Burma and India in support of the Allied efforts against the Imperial Japanese Army during the Japanese invasion and occupation of Burma in the South-East Asian theatre of the Second World War.
Lieutenant General George Edward Stratemeyer was a senior commander in the United States Air Force. He held senior command appointments in the China Burma India Theater of World War II and was Far East Air Forces commander during the first year of the Korean War.
The Burma campaign in the South-East Asian Theatre of World War II took place over four years from 1942 to 1945. During the first year of the campaign, the Imperial Japanese Army with aid from Burmese insurgents had driven British forces and Chinese forces out of Burma, and occupied most of the country. From May to December 1942, most active campaigning ceased as the monsoon rains made tactical movement almost impossible in the forested and mountainous border between India and Burma, and both the Allies and Japanese faced severe logistical constraints.
The fighting in the Burma campaign in 1944 was among the most severe in the South-East Asian Theatre of World War II. It took place along the borders between Burma and India, and Burma and China, and involved the British Commonwealth, Chinese and United States forces, against the forces of Imperial Japan and the Indian National Army. British Commonwealth land forces were drawn primarily from the United Kingdom, British India and Africa.
The Burma campaign in the South-East Asian Theatre of World War II was fought primarily by British Commonwealth, Chinese and United States forces against the forces of Imperial Japan, who were assisted by the Burmese National Army, the Indian National Army, and to some degree by Thailand. The British Commonwealth land forces were drawn primarily from the United Kingdom, British India and Africa.
Y Force was the South East Asia Command designation given to Chinese National Revolutionary Army forces that re-entered Burma from Yunnan in 1944 as one of the Allies fighting in Burma Campaign of World War II. It consisted of 175,000 troops divided into 15 divisions.
The siege of Myitkyina was an engagement during the Burma campaign of World War II. The Allied victory was part of the larger Battle of Northern Burma and Western Yunnan which succeeded in opening the Ledo Road.
178th Assault Field Regiment, Royal Artillery, was a British Army unit during World War II. Formed as a conventional field artillery regiment in 1942, it was sent to Burma where it was given a range of specialist roles, ranging from operating tracked self-propelled guns to manning light howitzers parachuted into jungle clearings. After the Japanese surrender, it saw action in the Allied Occupation of Java before disbanding in late 1946.
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