Months after a high-profile ceasefire pushed by Donald Trump, Thailand and Cambodia are firing at each other again along their disputed border – with artillery, airstrikes and accusations flying in both directions.
The renewed clashes have killed soldiers and civilians on both sides, forced mass evacuations, and raised a simple but urgent question: why did the Trump-backed truce fail so quickly?
In July 2025, after some of the worst fighting in more than a decade, Thailand and Cambodia agreed to an “immediate and unconditional” ceasefire. The deal was reached at talks hosted in Malaysia and strongly backed by Washington.
Trump publicly took credit, saying his pressure and phone diplomacy helped convince both governments to stop shooting. For a while, the guns fell mostly silent. People who had fled their homes began to return.
But the ceasefire was always fragile. It stopped the violence without settling the core dispute: where exactly the border runs, especially around sensitive areas like the Preah Vihear and Ta Moan Thom temple zones. Those maps, and the history behind them, never left the table.
To understand why Thailand and Cambodia are fighting again, you have to look at the map – and the past.
The border was drawn more than a century ago, when Cambodia was under French colonial rule. Thailand argues that some of those colonial maps are inaccurate and unfair. Cambodia insists they are legally binding and backed by an international court ruling.
Both countries see key temples and borderlands as part of their national identity. That turns a technical boundary line into an emotional symbol. Any perceived “concession” can look like betrayal at home, which makes compromise politically dangerous.
How the new fighting started
Tension never really disappeared after July.
- Small incidents and skirmishes continued to be reported along the 800-kilometre frontier.
- Each side accused the other of minor ceasefire violations and border incursions.
- In one key flashpoint, a Thai soldier was badly injured by a landmine in a disputed area. Thai officials hinted the mine was newly laid and said the ceasefire was effectively being undermined. Cambodia denied breaking the deal.
By early December, the situation snapped.
Heavy fighting flared up at several points along the border. Thailand launched airstrikes on what it described as Cambodian military positions. Cambodia reported shells landing near homes and villages and said Thai forces were hitting civilian areas.
Both governments deny targeting civilians. Both blame the other for firing first. The result, however, is clear: the Trump-brokered ceasefire has collapsed on the ground, even if it still exists on paper.
Nationalism and politics on both sides
Domestic politics are fueling the fire.
In Thailand, leaders cannot afford to look weak on territorial issues. Strong rhetoric about defending sovereignty plays well with nationalists and sections of the military.
In Cambodia, the government insists it is responding to Thai aggression and defending its land and people. Images of damaged homes and frightened families help build public anger and unity behind a tough line.
This mutual pressure means that backing down is risky for both sides, even when the cost of continuing to fight is high.
Trump’s role – and its limits
Trump’s role is unusual: a U.S. president publicly saying he can “end the conflict with a phone call.” His threats over trade and his July diplomacy did help push both sides into accepting the first ceasefire.
Now, as fighting resumes, Trump says he is preparing another round of calls to Bangkok and Phnom Penh. But Thai officials have signalled they want the issue handled “bilaterally,” a hint they do not want to be seen as bending to outside pressure again.
That highlights the limits of external mediation: diplomats can pause a war, but they cannot on their own rewrite borders or erase decades of mistrust.
The people paying the price
Behind the headlines, the cost is human:
- Civilians killed and injured by shelling and airstrikes.
- Hundreds of thousands of people displaced or sheltering in temporary camps and schools.
- Farmers abandoning fields, traders cut off by closed crossings, children kept home as schools near the border shut their doors.
- UNESCO-listed temples and historic sites once again at risk of damage in the crossfire.
For families who only just returned after the July clashes, packing up and fleeing again is a brutal reminder that paper peace means little when the front line runs past your front door.
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