The Southeast Asia Treaty Organization (SEATO) was established in 1954 to promote collective defense and prevent the spread of communism in Southeast Asia. It was formed by the United States, the United Kingdom, France, Australia, New Zealand, Pakistan, Thailand, and the Philippines. SEATO aimed to provide military assistance and support to member nations facing threats from communist movements. Despite its intentions, SEATO struggled with internal disagreements and lacked a unified military command. The organization was ultimately dissolved in 1977, as many member countries shifted their focus to regional cooperation and other alliances, such as the Association of Southeast Asian Nations (ASEAN).