NextFin News - In a significant escalation of Southeast Asian geopolitical tensions, Cambodian Prime Minister Hun Manet accused Thai forces on Tuesday, February 17, 2026, of occupying Cambodian territory in direct violation of a peace accord brokered by U.S. President Donald Trump. Speaking from Washington during a high-profile visit to attend U.S. President Trump’s newly established Board of Peace meeting, Manet characterized the border situation as "fragile" and called for the immediate activation of a joint boundary commission to prevent a return to open conflict. According to Channel News Asia, the Cambodian leader alleged that Thai troops have moved "deep into Cambodian territory," fortifying positions with shipping containers and barbed wire in areas previously recognized as Cambodian soil.
The dispute centers on the 817km shared border, where the worst fighting in over a decade erupted in July 2025, displacing hundreds of thousands of civilians and paralyzing regional trade. Although a ceasefire was reached on December 27, 2025, through the personal intervention of U.S. President Trump and the Malaysian Prime Minister, Manet insists that the "facts on the ground" contradict the spirit of the agreement. Thailand has swiftly rejected these claims. Rear Admiral Surasant Kongsiri, spokesperson for the Thai Defence Ministry, stated that Thai forces are merely maintaining existing deployments as part of de-escalation measures and denied any new reinforcements or territorial encroachment. According to Nation Thailand, the Thai military maintains that it is establishing 500-meter buffer zones to prevent skirmishes, rather than seeking territorial expansion.
The timing of these accusations is inextricably linked to the domestic political landscape in Bangkok. Thai Prime Minister Anutin Charnvirakul recently secured a victory in the February 8, 2026, general elections, having campaigned on a platform of robust nationalism fueled by the border conflict. Manet suggested that Thailand had previously used the election as a pretext to delay technical demarcation work. With the polls concluded, the Cambodian government is now demanding that the Joint Boundary Commission (JBC) begin measuring and demarcating "hot zones" to allow displaced residents to return to their homes and businesses, including the seized O'Smach Resort in Oddar Meanchey province.
From an analytical perspective, this friction underscores the inherent limitations of "transactional diplomacy" favored by the current U.S. administration. While U.S. President Trump has touted the December ceasefire as a landmark success for his Board of Peace, the reality suggests that high-level signatures have not yet translated into technical resolution. The conflict is a classic example of a zero-sum territorial dispute where domestic political survival—particularly for Charnvirakul—depends on maintaining a hardline stance. For Manet, a West Point graduate, the pivot toward Washington represents a strategic attempt to balance Cambodia’s long-standing reliance on China with a new security partnership with the United States. However, this rebalancing is being tested by the very real threat of renewed border skirmishes that could undermine his domestic legitimacy.
The involvement of the United States in this bilateral dispute also signals a broader shift in regional power dynamics. By acting as a mediator, U.S. President Trump is attempting to erode China’s influence in Phnom Penh, which has historically been Beijing’s closest ally in ASEAN. Manet’s presence in Washington and his praise for warmer ties with the U.S. indicate that the "Ream Naval Base" era of exclusive Sino-Cambodian cooperation may be evolving into a more multi-aligned foreign policy. Yet, the U.S. faces a delicate balancing act: supporting Cambodia’s territorial integrity risks alienating Thailand, a treaty ally, while failing to restrain Thai encroachment could push Manet back into the arms of Beijing for security guarantees.
Looking ahead, the probability of the ceasefire holding depends less on international mediation and more on the technical progress of the JBC. If Thailand continues to delay demarcation citing the complexities of forming a new post-election government, Cambodia may seek further internationalization of the conflict, potentially involving historical colonial-era maps from France to bolster its claims. Data from the 2025 conflict suggests that even minor tactical miscalculations at the border can lead to rapid escalation; with hundreds of thousands of lives and millions in cross-border trade at stake, the "Trump Peace" remains a surface-level achievement awaiting a structural foundation. The coming months will determine whether the Board of Peace can move beyond brokering handshakes to resolving the granular, map-based realities of Southeast Asian sovereignty.
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