Kegagalan Southeast Asia Treaty Organisation (SEATO) di Asia Tenggara, 1954-1977

This article investigates the failure of the Southeast Asia Treaty Organisation (SEATO), a regional security alliance established in 1954 with the principal objective of containing the spread of communism in Southeast Asia. The study aims to critically assess the key factors contributing to SEATO’s ineffectiveness, focusing on its weak institutional design, unbalanced membership composition, and inability to align its strategic and military framework with the political, social, and cultural realities of the postcolonial Southeast Asian context. Particular emphasis is placed on SEATO’s lack of a binding collective defence mechanism, unlike NATO’s Article 5 and the alliance’s overreliance on the United States (US), which ultimately undermined its legitimacy and credibility among regional actors. This study adopts a qualitative methodology grounded in content analysis of secondary literature in history and international relations. It also considers the strategic positions of key non member states such as Indonesia and India and examines SEATO’s role during the Indochina conflict. The findings reveal that SEATO failed to foster a cohesive regional identity and secure broad-based support from major Asian powers that favoured non-alignment. Its structural dependency on Western leadership, absence of collective regional commitment, and lack of operational capacity rendered the alliance ineffective as a long-term security mechanism. Furthermore, the disconnect between the geopolitical aims of Western powers and the sovereignty concerns of newly decolonised Asian nations contributed to the alliance’s declining relevance and eventual dissolution. The study concludes that attempts to transplant Western-style security models like North Atlantic Treaty Organisation (NATO) into Southeast Asia without adapting to the region’s historical, political, and cultural complexities are inherently limited. This research contributes to the broader scholarly discourse on Cold War geopolitics and underscores the necessity of developing context-sensitive and locally grounded approaches to regional security cooperation.