Thailand-Cambodia Border Dispute Triggers Political Turmoil in Bangkok – Thailand Business News

A leaked conversation between Thai Prime Minister Paetongtarn Shinawatra and former Cambodian PM Hun Sen has exposed internal tensions between Thailand’s military and government, sparking public outrage and political backlash across the country.

• Border Dispute: Tensions escalated over disputed border areas with Khmer temple ruins. A Cambodian soldier was killed in late May. Cambodia has brought the case to the International Court of Justice (ICJ), while Thailand prefers bilateral negotiations.
• Political Fallout: PM Paetongtarn is criticized by both royalists and progressives. A coalition partner, Anutin Charnvirakul, resigned, weakening the government’s parliamentary majority.
• Calls for Resignation: The opposition, including Nattapong Ruangpanyawut of the reformist People’s Party, urges the prime minister to dissolve parliament to avoid further instability or a potential military coup.

In Bangkok, the crisis has deepened political divisions. Prime Minister Paetongtarn Shinawatra faces domestic pressure from nationalists and opposition groups criticizing her government’s handling, especially given her family’s historical ties with Cambodia’s Hun family. A leaked call between Paetongtarn and former Cambodian PM Hun Sen, where she urged restraint, has fueled speculation of discord with Thailand’s military, which has adopted a hawkish stance, preparing for “high-level operations.”

Nationalist protests in Bangkok and Phnom Penh, coupled with Thailand’s border restrictions and Cambodia’s retaliatory measures, risk further escalation. Despite de-escalation pledges, the JBC meeting on June 14 yielded no resolution, and Cambodia’s ICJ filing on June 15 has heightened tensions. Analysts warn of potential economic losses and the risk of military escalation if nationalist sentiments override diplomatic efforts.

The Thailand–Cambodia border dispute is a long-standing and complex issue rooted in colonial-era cartography, nationalism, and contested heritage sites. Here’s a breakdown of the key historical and geopolitical background:

1. Colonial-Era Origins

• The dispute dates back to 1904–1907, when France, then the colonial power in Cambodia, and Siam (now Thailand) signed treaties to demarcate their shared border.
• A French-drawn map placed the Preah Vihear Temple—an 11th-century Hindu temple—on the Cambodian side. Thailand later contested this, arguing the map was flawed and biased.

2. ICJ Rulings and Tensions

• In 1962, the International Court of Justice (ICJ) ruled that the temple itself belonged to Cambodia, but left the surrounding land ambiguous.
• Tensions reignited in 2008 when Cambodia registered Preah Vihear as a UNESCO World Heritage Site, prompting military skirmishes and nationalist protests in both countries.
• In 2013, the ICJ clarified that Cambodia also had sovereignty over the land surrounding the temple, ordering Thai troops to withdraw.

3. Recent Escalations

• The current flare-up began in May 2025, when a Cambodian soldier was killed in a disputed area near the Emerald Triangle, where Thailand, Cambodia, and Laos meet.
• Cambodia has since brought the issue back to the ICJ, seeking rulings on four additional disputed sites.
• Thailand, however, rejects the ICJ’s jurisdiction and insists on resolving the matter through bilateral talks.

4. Nationalism and Political Fallout

• The dispute has fueled nationalist sentiment in both countries. Cambodia has held mass rallies, while Thailand has tightened border controls and threatened economic retaliation.
• The issue has also triggered political instability in Bangkok, with opposition parties calling for the prime minister’s resignation amid accusations of mishandling the crisis.

• The dispute has fueled nationalist sentiment in both countries. Cambodia has held mass rallies, while Thailand has tightened border controls and threatened economic retaliation.
• The issue has also triggered political instability in Bangkok, with opposition parties calling for the prime minister’s resignation amid accusations of mishandling the crisis.

Disputed Border Sites Between Thailand and Cambodia

These sites are located along the Dangrek mountain range, a historically contentious zone due to colonial-era boundary maps. Cambodia is pushing for international arbitration, while Thailand maintains that the Joint Boundary Commission (JBC) should handle the matter bilaterally

Tensions along the Thailand-Cambodia border intensified in 2025, focusing on the long-disputed 817-km boundary. The conflict escalated following a clash on May 28 in the Chong Bok area, resulting in the death of a Cambodian soldier. This incident, stemming from a century-old dispute over undemarcated territories such as the Preah Vihear temple, has reignited nationalist sentiments and further strained relations between the two nations.

Thailand insists on resolving disputes through bilateral talks via the Joint Boundary Commission (JBC), while Cambodia seeks International Court of Justice (ICJ) intervention, a move Thailand rejects, citing non-recognition of the ICJ’s jurisdiction. Both nations have reinforced troops, with Thailand tightening border controls and Cambodia banning Thai imports and media.