The Southeast Asia Treaty Organization (SEATO) was an international organization for collective defense in Southeast Asia created by the Southeast Asia Collective Defense Treaty 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 was also in Bangkok. A total of eight members joined the organization in its lifetime.
The Southeast Asia Treaty Organization disbands.
On June 30, in the year 1977, The Southeast Asia Treaty Organization disbands. This event is recorded as a Historical Events event in the history of June 30, one of 393 recorded events on this date across all of history.
Key Facts
- This event took place on June 30, 1977 (AD era).
- It is categorised as a Historical Events event in recorded history.
- Referenced in 1 Wikipedia article.
- Wikipedia source last updated on 2 June 2026.
On This Date in History 393
This article draws on content from Wikipedia, available under CC BY-SA 4.0.
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