Thailand Steps Up Military Readiness After Deadly Cambodia Border Clashes

Fighter Jets and a Fragile Ceasefire

Thailand has increased military readiness and announced plans to buy additional fighter jets after five days of fighting with Cambodia left dozens dead and forced large numbers of civilians from their homes. As of August 9, 2025, a ceasefire agreed on July 28 has halted the main confrontation, but both armies remain on alert and accusations continue across the border.

The violence, which erupted on July 24, was the most serious confrontation between the Southeast Asian neighbors in more than a decade. Thai F-16 fighter jets struck Cambodian military positions as artillery, mortars and rockets were used around disputed temples and stretches of the border where the boundary has not been agreed.

Thai authorities reported at least 13 civilian deaths and more than 40,000 people displaced from border provinces. Relief agencies estimated that displacement across both countries had exceeded 300,000 people since the violence began. The figures describe different populations: the Thai authorities counted displacement on their side, while the relief estimate covered both countries.

The crisis has brought together three immediate problems: protecting civilians, keeping the ceasefire in place and managing a territorial dispute made more volatile by domestic politics. Thailand's military modernization plans have become part of its response, while Cambodia has sought international intervention and demanded the return of captured soldiers.

Malaysia, serving as chair of the Association of Southeast Asian Nations, or ASEAN, helped broker the ceasefire with support from the United States. China, Japan, the European Union and other ASEAN members also called for restraint. The diplomatic effort has reduced the immediate fighting, while the territorial disagreements and political pressures behind it remain unresolved.

How the Border Crisis Escalated

The latest escalation began in May 2025, when a Cambodian soldier was killed in a brief exchange of gunfire. Landmine incidents that injured Thai soldiers deepened the confrontation. Thailand and Cambodia accused each other of provocation and of entering territory claimed by the other.

By July 24, the dispute had become open warfare around Ta Muan Thom Temple and other border locations. Both governments blamed the other for starting the violence. Their accusations included breaches of local arrangements involving drones and barbed wire near the temple.

The main events unfolded as follows:

• May 2025: A Cambodian soldier was killed in a brief exchange of gunfire. Subsequent landmine incidents injured Thai soldiers and increased tensions.
• Early on July 24: Both sides accused each other of violating arrangements near Ta Muan Thom Temple, including deploying drones and barbed wire.
• 8:20 a.m. on July 24: Gunfire began and quickly escalated into artillery and rocket attacks.
• 10:40 a.m. on July 24: Thai F-16 fighter jets bombed targets inside Cambodia, marking the first use of air power in the conflict.
• Throughout July 24: Fighting spread to at least six locations, with both armies using heavy weapons, including BM-21 rocket launchers and mortars.
• By midday on July 24: Thailand had closed all border checkpoints, and both governments issued statements blaming each other.
• July 28: After five days of intense fighting, the two countries agreed to an immediate and unconditional ceasefire, effective at midnight.

The spread of fighting across several locations made the crisis much larger than the brief encounter in May. Heavy weapons brought villages and other civilian areas into the violence, while the closure of every border checkpoint disrupted movement across the frontier.

Thailand Uses Air Power and Plans New Purchases

Thailand deployed six F-16 fighter jets from Ubon Ratchathani province, with at least one aircraft carrying out bombing runs against Cambodian military positions. The Thai military described its use of air power as a precision response to Cambodian rocket attacks on Thai villages.

Cambodia condemned the strikes as disproportionate and dangerous. Its forces relied more heavily on artillery and rocket launchers mounted on trucks, while Thailand's deployment of advanced aircraft showed its military advantage in the confrontation.

Thailand's acting prime minister, Phumtham Wechayachai, said the government and armed forces were prepared to protect the country and its people:

The military and government are fully committed and equipped to ensure national security and civilian safety.

The Thai government also announced plans to purchase additional fighter jets and modernize its armed forces. It presented those plans as a way to deter further aggression and protect the border. The announcement gave no aircraft model, purchase quantity, cost or delivery date.

Military deterrence means trying to prevent an attack by showing that it would meet a powerful response. Thailand's approach combined immediate deployments with plans for additional equipment. Cambodia's response placed greater weight on diplomatic pressure alongside its military operations.

Cambodian Prime Minister Hun Manet appealed to the United Nations Security Council for an urgent meeting, accusing Thailand of unprovoked aggression. The two governments therefore pursued competing accounts of the same escalation: Thailand said it was responding to attacks on its communities, while Cambodia described the Thai strikes as aggression.

Civilians Face Death, Evacuation and Disruption

Artillery and rocket attacks struck villages, hospitals and residential areas. Thai authorities attributed at least 13 civilian deaths to Cambodian rocket attacks and said dozens more people were wounded, including children. Cambodia also reported casualties and accused Thailand of reckless military aggression.

More than 40,000 people were displaced from Thai border provinces, according to Thai authorities. Cambodia evacuated thousands from its side of the frontier. Relief agencies estimated that more than 300,000 people across both countries had been displaced since the violence began.

Families sought safety in fortified bomb shelters and temporary camps. Humanitarian organizations worked to provide food, medical care and psychological support as communities faced the immediate danger of shelling and the distress of leaving their homes.

The civilian consequences extended beyond the battle sites. Evacuations uprooted communities, attacks affected places where people lived and received care, and border closures added to the economic disruption. For those sheltering away from home, the ceasefire made the prospect of safety dependent on whether both militaries continued to observe it.

The conflict also left communities traumatized by violence. Psychological support formed part of the relief response alongside food and medical treatment, reflecting the needs of people who had experienced attacks, injury or sudden displacement.

Captured Soldiers Become a Ceasefire Issue

Thai forces captured at least 20 Cambodian soldiers during the fighting. Two wounded soldiers were returned, while Cambodia demanded the release of those still held under international humanitarian law.

International humanitarian law refers to the rules governing conduct during armed conflict, including the treatment of people in custody. In this crisis, the handling of captured soldiers became a continuing dispute even after the ceasefire agreement.

Both countries accused the other of mistreating detainees and violating the laws of war. The ceasefire commitments included compliance with international humanitarian law in the treatment of prisoners, making their welfare part of the effort to stabilize the border.

Cambodia continued to demand the release of its captured soldiers after the truce. Their detention, alongside allegations of mistreatment, kept a direct human dispute between the governments active while military and diplomatic discussions continued.

Why the Temples and Border Remain Disputed

The territorial disagreement stretches back more than a century. The 817-kilometer land border was first mapped by France in 1907, when Cambodia was a French colony. Treaties from that period and ambiguous maps have remained central to competing claims.

Preah Vihear and Ta Moan Thom, also rendered Ta Muan Thom, are among the most contentious temple sites. Both date to the 11th century and carry historical and cultural importance for the two countries. Claims involving the temples combine questions of territory with national pride.

The International Court of Justice, or ICJ, awarded Preah Vihear temple to Cambodia in 1962. Land surrounding the temple remains disputed. The continuing argument over nearby territory helps explain why a ruling on the temple itself did not bring an end to border tensions.

Cambodia's successful bid to have Preah Vihear listed as a UNESCO World Heritage Site in 2008 reignited tensions. Deadly clashes and further involvement by the ICJ followed. Fighting in 2008 and 2011 left dozens dead, making the July 2025 confrontation part of a longer pattern of violence around the frontier.

Both countries have maintained military outposts near disputed sites. In areas where the boundary has not been marked and accepted by both governments, movements by soldiers or the placement of barriers can quickly become accusations of territorial encroachment.

The temples therefore have two roles in the dispute. They are historic places claimed as part of national heritage, and they sit within areas where control of the surrounding ground is contested. Military deployments near them place those competing claims in direct contact.

Political Turmoil Adds Pressure in Bangkok and Phnom Penh

Thailand entered the crisis amid political instability. Prime Minister Paetongtarn Shinawatra had been suspended, and a fragile coalition government left the military with greater authority over border matters.

A leaked phone call between Thai and Cambodian leaders further inflamed public opinion and produced political fallout in Bangkok. The border confrontation became entangled with arguments about leadership and national loyalty at a time when the Thai government was already under pressure.

In Cambodia, Hun Manet faced pressure to assert his leadership and defend national sovereignty. As the son of longtime leader Hun Sen, he was managing a crisis that demanded both a military response and a public demonstration of resolve.

Nationalist sentiment in both countries increased the political cost of appearing to give ground. The dispute offered leaders an opportunity to rally public support, while the fighting brought deaths, displacement and economic disruption to the communities closest to the border.

Accusations Spread Beyond the Battlefield

Both governments used nationalist rhetoric and propaganda to build domestic support. Accusations of betrayal, insults to the monarchy and allegations of foreign interference circulated widely in the media. Social media spread rumors and misinformation as the conflict intensified.

Thailand and Cambodia each accused the other of starting the fighting and targeting civilians. Those competing claims continued alongside diplomatic efforts, keeping public anger high even as the governments negotiated a halt to attacks.

Thailand also accused Cambodia of provocations after the ceasefire, including cyberattacks and drone violations of zones where flights were prohibited. Cambodia continued to accuse Thailand of mistreating captured soldiers and demanded their release.

The propaganda contest added pressure to an already fragile truce. Military readiness, allegations of new incidents and public demands for a firm response remained part of the crisis after the main fighting stopped.

Malaysia Helps Broker a Halt to the Fighting

Malaysia played a central role in arranging the ceasefire as ASEAN chair. Talks facilitated by Malaysia and supported by the United States produced the agreement for an immediate and unconditional halt to fighting, effective at midnight on July 28.

Thailand and Cambodia committed to stop all attacks, avoid unprovoked firing and use bilateral mechanisms to consult over future incidents. Bilateral mechanisms are channels through which the two governments or their militaries speak directly to manage a dispute.

The agreement also called for further meetings of the General Border Committee, or GBC, to monitor the ceasefire. Observers from Malaysia, the United States and China were expected to participate in future talks.

The United Nations Security Council convened an emergency meeting on the crisis. China, Japan, the European Union, the United States and ASEAN members urged restraint and dialogue, reflecting concern that continued fighting could threaten wider regional stability.

Thailand rejected third party mediation while remaining open to bilateral talks or mediation by Malaysia. Cambodia sought international intervention and referred unresolved border issues to the ICJ. Those positions showed continuing differences over where and how the territorial questions should be addressed.

What the Truce Changes for the Border

The July agreement created a framework for stopping attacks and discussing new incidents. Its practical demands were immediate: soldiers had to hold their fire, commanders had to use agreed channels, and both governments had to address the treatment of prisoners.

The next diplomatic steps centered on further General Border Committee meetings and expected international observers. The ceasefire arrangements gave no date for those meetings.

ASEAN's involvement made the crisis a test of its ability to manage disputes between members. Malaysia's role connected regional diplomacy with direct negotiations between the two countries, while support from major powers added international pressure for restraint.

Thailand's military purchases and readiness measures remained part of its response to the perceived threat. Cambodia continued to defend its territorial claims through diplomatic and legal channels while seeking the return of its soldiers. The two governments were pursuing security through different combinations of military strength, negotiation and international involvement.

For border residents, the central issue was whether the halt in fighting would last. Hundreds of thousands had been displaced, communities were dealing with trauma, and both armies remained alert. Political and nationalist pressure continued to pose a risk to diplomatic efforts.

Key Points

• Fighting erupted on July 24, 2025, and spread to at least six border locations before a ceasefire agreed on July 28.
• Thailand deployed six F-16 fighter jets, carried out airstrikes and announced plans for additional fighters and military modernization.
• Thai authorities reported at least 13 civilian deaths and more than 40,000 people displaced from Thai border provinces. Relief agencies estimated displacement across both countries at more than 300,000.
• Thai forces captured at least 20 Cambodian soldiers and returned two wounded soldiers. Cambodia demanded the release of those still held.
• Malaysia helped broker the ceasefire with United States support. Further General Border Committee meetings and international observers were expected.
• As of August 9, territorial disputes, political pressure and accusations of new provocations continued, with both militaries on alert.