Short answers, pulled from the story.
The Southeast Asia Treaty Organization formally established on the 19th of February 1955 during a meeting in Bangkok, Thailand. The organization officially dissolved on the 30th of June 1977 during the Carter administration.
Eight nations joined SEATO including Australia, France, New Zealand, Pakistan, and the United States. The Philippines and Thailand were the only Southeast Asian countries actually participating while Burma and Indonesia rejected joining due to domestic stability concerns rather than communist threats.
Internal disagreements prevented any actual deployment of these coordinated units because France and the United Kingdom rejected using military action during conflicts in Laos. Involvement of SEATO in the Vietnam War was denied due to lack of British and French cooperation even though both the United States and Australia cited the alliance as justification for their involvement in Vietnam.
SEATOs first Secretary General Pote Sarasin created the Graduate School of Engineering in Thailand during 1959 which currently operates as the Asian Institute of Technology training engineers across the region. The organization also sponsored creation of the Teacher Development Center located in Bangkok and established ninety-one artisan training workshops primarily within Thailand boundaries through its Skilled Labor Project.
The organization officially dissolved on the 30th of June 1977 after Pakistan withdrew in 1973 following East Pakistan seceded and became Bangladesh on the 16th of December 1971. France withdrew financial support in 1975 after South Vietnam was defeated and annexed by North Vietnam leading the SEATO council to agree to phasing out the organization.