Southeast Asia Treaty Organization
Southeast Asia Treaty Organization From Wikipedia, the free encyclopedia (Redirected from Southeast Asia Collective Defense Treaty ) Jump to navigation Jump to search Former international organization for collective defense in Southeast Asia Southeast Asia Treaty Organization SEATO's flag Map of SEATO members, shown in blue. Abbreviation SEATO Formation 8 September 1954 Dissolved 30 June 1977 Type Intergovernmental military alliance Headquarters Bangkok , Thailand Region served Southeast Asia Membership 8 nations Australia New Zealand Pakistan Philippines Thailand France United Kingdom United States States protected by SEATO 2 nations South Vietnam Kingdom of Laos 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 M