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Map of SEATO members, shown in blue.
|Formation||8 September 1954|
|Extinction||30 June 1977|
|Type||Intergovernmental military alliance|
States protected by SEATO
The Southeast Asia Treaty Organization (SEATO) was an international organization for collective defense in Southeast Asia created by the Southeast Asia Collective Defense Treaty, or Manila Pact, signed in September 1954 in Manila, Philippines. The formal institution of SEATO was established on 19 February 1955 at a meeting of treaty partners in Bangkok, Thailand. The organization's headquarters were also in Bangkok. Eight members joined the organization.
Primarily created to block further communist gains in Southeast Asia, SEATO is generally considered a failure because internal conflict and dispute hindered general use of the SEATO military; however, SEATO-funded cultural and educational programs left long-standing effects in Southeast Asia. SEATO was dissolved on 30 June 1977 after many members lost interest and withdrew.
The Southeast Asia Collective Defense Treaty, or Manila Pact, was signed on 8 September 1954 in Manila, as part of the American Truman Doctrine of creating anti-communist bilateral and collective defense treaties. These treaties and agreements were intended to create alliances that would contain communist powers (Communist China, in SEATO's case). This policy was considered to have been largely developed by American diplomat and Soviet expert George F. Kennan. President Dwight D. Eisenhower's Secretary of State John Foster Dulles (1953–1959) is considered to be the primary force behind the creation of SEATO, which expanded the concept of anti-communist collective defense to Southeast Asia, and then-Vice President Richard Nixon advocated an Asian equivalent of NATO upon returning from his late-1953 Asia trip. The organization, headquartered in Bangkok, was created in 1955 at the first meeting of the Council of Ministers set up by the treaty, contrary to Dulles's preference to call the organization "ManPac".
SEATO was intended to be a Southeast Asian version of the North Atlantic Treaty Organization (NATO), in which the military forces of each member would be coordinated to provide for the collective defense of the members' country. Organizationally, SEATO was headed by the Secretary General, whose office was created in 1957 at a meeting in Canberra, with a council of representatives from member nations and an international staff. Also present were committees for economics, security, and information. SEATO's first Secretary General was Pote Sarasin, a Thai diplomat and politician who had served as Thailand's ambassador to the U.S. between 1952 and 1957, and as Prime Minister of Thailand from September 1957 to 1 January 1958.
Unlike the NATO alliance, SEATO had no joint commands with standing forces. In addition, SEATO's response protocol in the event of communism presenting a "common danger" to the member nations was vague and ineffective, though membership in the SEATO alliance did provide a rationale for a large-scale U.S. military intervention in the region during the Vietnam War (1955–1975).
Despite its name, SEATO mostly included countries located outside of the region but with an interest either in the region or the organization itself. They were Australia, France, New Zealand, Pakistan (including East Pakistan, now Bangladesh), the Philippines, Thailand, South Vietnam, the United Kingdom and the United States.
The Philippines, Thailand and South Vietnam were the only Southeast Asian countries that actually participated in the organization. They shared close ties with the United States, particularly the Philippines, and they faced incipient communist insurgencies against their own governments. Thailand became a member upon the discovery of the newly founded "Thai Autonomous Region" (the Xishuangbanna Dai Autonomous Prefecture) in Yunnan (in South West China) – apparently feeling threatened by potential Chinese communist subversion on its land. Other regional countries like Burma and Indonesia were far more mindful of domestic internal stability rather than any communist threat, and thus rejected joining it. Malaya (including Singapore) also chose to not participate formally, though it was kept updated with key developments due to its close relationship with the United Kingdom. The rest of Southeast Asian countries: North Vietnam, Cambodia and Laos were prevented from taking part in any international military alliance as a result of the Geneva Agreements signed 20 July of the same year concluding the end of the First Indochina War. However, with the lingering threat coming from communist North Vietnam and the possibility of the domino theory with Indochina turning into a communist frontier, SEATO got these countries under its protection – an act that would be considered to be one of the main justifications for the U.S. involvement in the Vietnam War. Cambodia, however rejected the protection in 1956.
The majority of SEATO members were not located in Southeast Asia. To Australia and New Zealand, SEATO was seen as a more satisfying organization than ANZUS – a collective defense organization with the U.S. The United Kingdom and France joined partly due to having long maintained colonies in the region, and partly due to concerns over developments in Indochina. Last but not least, the U.S. upon perceiving Southeast Asia to be a pivotal frontier for Cold War geopolitics saw the establishment of SEATO as essential to its Cold War containment policy.
All in all, the membership reflected a mid-1950s combination of anti-communist Western nations and such nations in Southeast Asia. The United Kingdom, France and the United States, the latter of which joined after the U.S. Senate ratified the treaty by an 82–1 vote, represented the strongest Western powers. Canada also considered joining, but decided against it in order to concentrate on its NATO responsibilities.
Average of contributions to civil and military budgets between 1958 and 1973  :
Secretaries-General of SEATO:
|Pote Sarasin||Thailand||5 September 1957||22 September 1957|
|William Worth (acting)||Australia||22 September 1957||10 January 1958|
|Pote Sarasin||Thailand||10 January 1958||13 December 1963|
|William Worth (acting)||Australia||13 December 1963||19 February 1964|
|Konthi Suphamongkhon [de]||Thailand||19 February 1964||1 July 1965|
|Jesus M. Vargas||Philippines||1 July 1965||5 September 1972|
|Sunthorn Hongladarom [de]||Thailand||5 September 1972||30 June 1977|
After its creation, SEATO quickly became insignificant militarily, as most of its member nations contributed very little to the alliance. While SEATO military forces held joint military training, they were never employed because of internal disagreements. SEATO was unable to intervene in conflicts in Laos because France and the United Kingdom rejected use of military action. As a result, the U.S. provided unilateral support for Laos after 1962. Though sought by the U.S., involvement of SEATO in the Vietnam War was denied because of lack of British and French cooperation.
Both the United States and Australia cited the alliance as justification for involvement in Vietnam. U.S. membership in SEATO provided the United States with a rationale for a large-scale U.S. military intervention in Southeast Asia. Other countries, such as the UK and key nations in Asia, accepted the rationale. In 1962, as part of its commitment to SEATO, the Royal Australian Air Force deployed CAC Sabres of its No. 79 Squadron to Ubon Royal Thai Air Force Base, Thailand. The Sabres began to play a role in the Vietnam War in 1965, when their air defence responsibilities expanded to include protection of USAF aircraft using Ubon as a base for strikes against North Vietnam.
In addition to joint military training, SEATO member states worked on improving mutual social and economic issues. Such activities were overseen by SEATO's Committee of Information, Culture, Education, and Labor Activities, and proved to be some of SEATO's greatest successes. In 1959, SEATO's first Secretary General, Pote Sarasin, created the SEATO Graduate School of Engineering (currently the Asian Institute of Technology) in Thailand to train engineers. SEATO also sponsored the creation of the Teacher Development Center in Bangkok, as well as the Thai Military Technical Training School, which offered technical programs for supervisors and workmen. SEATO's Skilled Labor Project (SLP) created artisan training facilities, especially in Thailand, where ninety-one training workshops were established.
SEATO also provided research funding and grants in agriculture and medical fields. In 1959, SEATO set up the Cholera Research Laboratory in Bangkok, later establishing a second Cholera Research Laboratory in Dhaka, Bangladesh. The Dhaka laboratory soon became the world's leading cholera research facility and was later renamed the International Centre for Diarrhoeal Disease Research, Bangladesh. SEATO was also interested in literature, and a SEATO Literature Award was created and given to writers from member states.
Though Secretary of State Dulles considered SEATO an essential element in U.S. foreign policy in Asia, historians have considered the Manila Pact a failure and the pact is rarely mentioned in history books. In The Geneva Conference of 1954 on Indochina, Sir James Cable, a diplomat and naval strategist, described SEATO as "a fig leaf for the nakedness of American policy", citing the Manila Pact as a "zoo of paper tigers".
Consequently, questions of dissolving the organization arose. Pakistan withdrew in 1972, after East Pakistan seceded and became Bangladesh on 26 March 1971. France withdrew financial support in 1975, and the SEATO council agreed to the phasing out of the organization. After a final exercise on 20 February 1976, the organization was formally dissolved on 30 June 1977. The Association of Southeast Asian Nations was founded on the structure and membership of the original SEATO members in Southeast Asia to later include Communist states.
Despite the dissolution of the SEATO in 1977, the Manila Pact remains in force and, together with the Thanat-Rusk communiqué of 1962, constitutes the basis of U.S. security commitments to Thailand.