Historically, the region’s security architecture has been largely defined by the Association of Southeast Asian Nations (ASEAN), predicated on a principle of non-interference. However, the assertive actions of China, coupled with the rising military capabilities of nations like India and the continued presence of the United States, have begun to fray the threads of this consensus. The 2011 Declaration on the Conduct of Parties in the South China Sea, while ostensibly a framework for peaceful resolution, has proven largely ineffective, with China continuing to expand its territorial claims through construction and militarization. This represents a significant historical departure from the established norms of diplomacy and the collaborative efforts historically used to maintain regional stability.
Key stakeholders in this evolving environment include China, with its expansive maritime ambitions and the concomitant desire to reshape the regional balance of power; ASEAN member states, particularly those with overlapping maritime disputes, such as the Philippines and Vietnam, grappling with balancing economic engagement with national security; Thailand, a crucial transit hub and a nation increasingly reliant on trade with China and the wider region; and the United States, seeking to maintain its strategic influence amidst a shifting geopolitical landscape. Estimates from the International Institute for Strategic Studies (IISS) suggest that China’s naval modernization program is on track to become the world’s largest by 2027, capable of projecting power across the Indian Ocean and potentially disrupting critical trade routes – a force to be reckoned with. According to Admiral Philip Davidson, former US Seventh Fleet commander, “China’s ability to operate effectively in the Western Pacific will depend heavily on its ability to secure and maintain access to key maritime chokepoints.”
Data from the Stockholm International Peace Research Institute (SIPRI) reveals a significant increase in global military expenditure over the past decade, with Asia accounting for a disproportionately large share. The Indian Navy, for instance, has undertaken a massive modernization program, acquiring advanced warships and submarines to counter Chinese influence in the Indian Ocean. Furthermore, the Australian Defence Force has ramped up its maritime surveillance capabilities in response to Chinese activities in the South China Sea. These developments underscore the escalating competition for regional dominance and the growing investment in military capabilities across Southeast Asia. A recent report by the Center for Strategic and International Studies (CSIS) highlights that “the lack of a robust multilateral security framework in the Indo-Pacific presents a significant challenge to maintaining stability and preventing escalation.”
Over the next six months, we can anticipate a further intensification of naval exercises and maritime patrols across the South China Sea and the Mekong River Delta. China’s continued construction activities in the Spratly Islands are likely to provoke further diplomatic protests from ASEAN nations, potentially leading to a deterioration in relations. The THAIFEX-ANUGA Asia trade show, scheduled for late 2026, will likely become a stage for subtle diplomatic maneuvering, with China leveraging its economic influence to solidify its position within ASEAN. Longer-term, the rise of China’s naval power poses a fundamental challenge to the existing regional order, potentially leading to a protracted period of strategic competition and increasing the risk of miscalculation or accidental conflict.
Looking five to ten years into the future, the potential for a more fragmented regional security architecture is elevated. The emergence of a US-China “cold war” could further exacerbate tensions in Southeast Asia, with both powers vying for influence and potentially supporting rival factions within ASEAN. Thailand’s strategic importance, as highlighted by the Advisor to the Minister of Foreign Affairs’ remarks at the Chile-ASEAN Business Summit 2026, suggests it will play a crucial role in navigating this evolving landscape, potentially acting as a bridge between China and the West. However, sustained regional stability hinges on the ability of ASEAN nations to collectively resist external pressure and uphold the principles of multilateralism.
The challenge for Thailand, and indeed for the entire ASEAN community, is not simply to maintain the status quo but to proactively shape a regional security architecture that reflects the evolving geopolitical realities. This requires a renewed commitment to diplomacy, strategic engagement, and collaborative efforts to address shared challenges, such as maritime security, climate change, and economic integration. The question is not whether China will continue to assert its influence, but how ASEAN and its partners will respond, demonstrating the capacity for collective action in a world increasingly defined by uncertainty and strategic competition. The conversation around this issue needs to move beyond simple declarations of commitment and toward concrete steps, solidifying a future where regional stability is not a passive aspiration, but a powerfully defended reality.