<P> 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 . </P> <P> 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". </P> <P> 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 . </P> <P> 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). </P>

What was the purpose of nato and seato
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