This is an attempt to revisit the history of the Southeast Asia Treaty Organisation from its formation to its demise in 1977. The majority of writings on SEATO were published between the 1950s and 1980s. There is only one single-authored study of SEATO (published in 1983) which covers the complete life cycle of the organisation. A new study of SEATO was published in 2012 after a long hiatus. However, this account focuses mainly on developments up to 1965. My monograph/ two-year book project will fill a gap in the
historiography of the international history and politics of Southeast Asia during the Cold War years. Now that we have the primary/declassified archival sources, then not available to the authors writing in the earlier decades, it is perhaps worth revisiting the organisation for a better understanding of it.