Suspension of peace deal On 10 November 2025, a landmine, reported to be Cambodian, exploded in the border in
Sisaket province, injuring two Thai soldiers, with one, Sergeant Major First Class Therdsak Samaphong, losing his right foot and the other, Private Vachira Panthana, experiencing chest pain. After this incident, Thailand announced it was suspending the implementation of a peace agreement with Cambodia. Following the incident, the
Cambodian Ministry of National Defence expressed regret, claimed that the explosion was caused by old landmines remaining from past conflicts. Ministry spokesperson Maly Socheata rejected Thai allegations that Cambodia had laid new mines, affirming compliance with the
Ottawa Treaty. The ministry urged Thai troops to avoid patrolling in known mine-contaminated zones to prevent further accidents and affirmed Cambodia's commitment to peace and bilateral cooperation. On 12 November 2025 at around 4:00 pm, the
Royal Thai Army reported hearing gunfire from the Cambodian side of the border for about ten minutes near Nong Ya Kaeo,
Sisaket province. Local Cambodian authorities and Cambodia's Defence Ministry accused the RTA of injuring five Cambodian civilians in
Prey Chan Village,
Ou Beichoan Commune,
Ou Chrov District,
Banteay Meanchey province, leaving one civilian dead and several others injured. The incident occurred two days after Thailand suspended the peace agreement following the Sisaket landmine explosion. Cambodian authorities stated that an investigation was under way and called for calm while urging both sides to avoid further escalation. In early December 2025, the RTAF signed a $108m deal to acquire the
Barak MX air defense system from
Israel Aerospace Industries.
December clashes On 7 December 2025 at around 2:15 p.m., Cambodia's Ministry of Defense claimed that Thai troops had opened fire with small arms,
B-40 grenade launchers, and 60 mm mortars at a Cambodian position in Prolean Thmor area of
Choam Khsant District,
Preah Vihear Province. Cambodia claimed that its troops immediately contacted their Thai counterparts to halt the attack, did not return fire, and that the shooting ceased by 2:32 p.m. Cambodian forces said they continued monitoring the situation while maintaining restraint. The ministry notified the ASEAN Observer Team and requested an investigation, reaffirming Cambodia's commitment to the ceasefire and peaceful resolution of border issues. On Thailand's side, Thailand's Ministry of Defense stated that Cambodian forces opened fire at around 2:15 p.m. at an area around Phu Pha Lek-Phlan Hin Paet Kon of
Sisaket Province while Thai soldiers and engineers were carrying out a mission to improve the route from Phu Pha Lek to Phieng Fa Checkpoint. Two Thai soldiers were injured, Sergeant Anuchart Rueankham was shot in the leg and another, Private Pornchai Champajumshot was struck in the chest area of his body armor. Thailand stated that Cambodian forces also fired a recoilless gun into Thai territory, prompting Thai forces to return fire in accordance with the rules of engagement and international principles of proportionality. The clash later ended at 2:50 p.m., The Ministry of Defence condemns the actions of the Cambodian side for claiming that the Thai military had fired first and that Cambodian forces did not return fire despite clear evidence that Thai soldiers were injured by Cambodian military weapons and intended to escalate tensions. Following a 35-minute clash in
Sisaket Province that injured two Thai soldiers, the Second Army Region of the Thai military announced border evacuations in Buriram, Surin, Sisaket, and Ubon Ratchathani and encouraged residents to hide in shelters, citing 'current uncertainty and the possibility that the clashes may escalate'.
8–9 December On the morning of 8 December, fighting erupted across the border. The
2nd Army Area of the Thai military announced that the RTAF had launched an air strike campaign along the border with Cambodia in retaliation to clashes that killed one Thai soldier in
Ubon Ratchathani province. The RTA also reported that the RCA launched
BM-21 rockets against Thai civilians. At around 5:04 a.m., Thai forces reportedly opened fire on Cambodian positions in Preah Vihear province, including the An Ses area, Tamoan Thom temple, and the 5 Makara zone. Cambodian authorities stated that their troops did not return fire and had not deployed heavy weapons, rejecting Thai claims that Cambodia provoked the attacks. Thailand also deployed F-16 fighter jets targeting Cambodian artillery positions. The clashes prompted evacuations in Preah Vihear and
Oddar Meanchey provinces, injured several civilians, damaged several houses, and led to temporary school and hospital closures on both sides of the border to protect civilians. At 2:30 p.m. Thailand set an ultimatum for a ceasefire at 6 p.m. or Thailand will use its full military strength. Thailand said it will continue using military action against Cambodia. The
Civil Aviation Authority of Thailand (CAAT) banned drone flights in several border provinces from December 9. Cambodia denied the accusations from Thailand that clashes resulted in the death of a Thai soldier. Cambodian information minister
Neth Pheaktra later informed
Agence France-Presse that Thai attacks killed at least four Cambodian civilians in Oddar Meanchey and Preah Vihear and that 10 others were also wounded. Fighting intensified on 9 December after the ultimatum. RTA Chief of Staff, General
Chaiyapruek Duangprapat, stated that the RTA's current objective is to "incapacitate the Cambodian army to prevent future threats or incursions." That same day, the RTN stated that "up to 80%" of Cambodian positions including weapon and supply storage were destroyed by the
Royal Thai Marine Corps (RTMC) during the operation around the "Three House"
casino complex near the border of
Trat province, while the RTMC suffered no casualty. According to the Cambodia's Ministry of National Defence spokeswoman Maly Socheata alleged that shelling by Thai forces between 8–9 December killed seven Cambodian civilians and injured 20 others. The ministry condemned the attacks as "inhuman and brutal", calling them a violation of the ceasefire and the Cambodia–Thailand Joint Declaration signed on 26 October 2025. Furthermore, reports indicated that Thailand deployed tanks and conducted airstrikes during the assault. Later that night, the RTA stated that the RCA's
PHL-03 long-range
multiple rocket launcher was spotted in
Kampong Thom province.
Cambodia's Ministry of Culture and Fine Arts condemned Thai military attacks on
Prasat Ta Khwai, describing them as "profoundly immoral" and a violation of cultural heritage. The ministry called on
UNESCO and
ASEAN to intervene and noted that nearby the Preah Vihear temple was also damaged, including facilities under a Cambodia–India conservation project. Cambodia pledged to hold those responsible accountable under international law.
10–11 December On 10 December, one day after the opening ceremony of the
2025 SEA Games hosted in Thailand, Cambodia announced the complete withdrawal of its delegation from the Games, citing escalating border clashes and safety fears expressed by athletes' families. Around 30 Cambodian athletes and officials had already taken part in the opening ceremony on 9 December, but the delegation exited the competition before any events began. An 4:30 p.m., the RTA officially codenamed the military operation as Operation Sattawat (Thai: ยุทธการศตวรรษ) to honour the fallen Thai soldiers and Sergeant Major Sattawat Sujarit, the first fallen soldier in the second clashes. The RTA also announced the destruction of a
tower crane near the
Preah Vihear complex which were allegedly used by the RCA for observation purposes. At 5.00 p.m., the RTA's Burapha command declared
martial law and curfew from 9 p.m. to 5 a.m. in four districts of
Sa Kaeo province. On the morning of 11 December, the RTAF's F-16 fighters bombed a casino in
Banteay Ampil district of Oddar Meanchey province, in addition of destroying the nearby oil depot via the RTA's artillery strikes. That same day, Cambodia accused Thai forces of shelling the Khnar Temple area as well as civilians in Banteay Meachay province.
12–13 December On 12 December, the RTA's 2nd Army Division released a statement that Cambodia employed
FPV suicide drones of similar design to the one used by Ukraine in the
Russo-Ukrainian war, which were allegedly controlled by foreign mercenaries. On 10:00 p.m., Thailand's prime minister
Anutin Charnvirakul confirmed that he has made a phone call with his Malaysian counterpart
Anwar Ibrahim and the US president
Donald Trump about potential ceasefire. According to Anutin, Trump "urged for a ceasefire", although he is "understanding" of Thailand's circumstance. In the press conference, Anutin reaffirmed the Thai government's position that the military operation is not an invasion, but a "defense of Thai sovereignty and people" and that Cambodia "must abide by the ceasefire, must withdraw their forces, and must disarm the minefields with observable results." On 13 December, Cambodia's prime minister
Hun Manet announced that he had phone conversation with both Anwar Ibrahim and Donald Trump to find ways for a ceasefire. During the phone call, he thanked their efforts for peaceful resolution and reaffirmed Cambodia's commitment to the Kualar Lumpur Joint Declaration. He also remarked his suggestion to use satellite verification regarding the shooting on 7 December. The same day, Cambodia accused Thailand of continuing airstrikes hours after U.S. President Donald Trump announced that Bangkok and Phnom Penh had agreed to a ceasefire. Cambodia's Ministry of National Defense stated that two Thai F-16 fighter jets dropped seven bombs on multiple targets, including hotel buildings and bridges in the Thmor Da area of
Pursat province. The ministry also reported that Thai naval forces fired artillery shells into
Koh Kong province in the early hours of the morning, striking coastal areas and civilian infrastructure. The clashes, which intensified earlier, forced residents in Koh Kong province to flee their homes, according to Cambodian authorities, as hostilities spread into coastal areas. At 6.10 a.m., the RTAF released images confirming the destruction of the Chay Chum Nia bridge and a casino in Pursat province via bombing campaign. Both locations are considered vital for the RCA's military supply and therefore designated "military targets" by the RTAF. Later, the RTN confirmed shelling against Cambodian positions on the Koh Yor island in Koh Kong province, stating that it destroyed two 130 mm battery emplacements. Several BM-21 strikes were reported in Sisaket and Sa Kaeo provinces, the former struck a civilian house resulting in numerous injuries. At the press conference on 6:20 p.m., Anutin denied Anwar Ibrahim's Facebook post that both Cambodia and Thailand will observe a ceasefire on 10:00 p.m. that day, stating that he has not made any ceasefire agreement during any of the phone calls with Ibrahim. Anutin cited the continued rocket attacks on border provinces as one of the reason for Thailand's refusal. At 10:00 p.m., fighting reportedly ceased around the border of the Surin province, although sporadic clashes were reported at
Chong Ahn Ma, which the RTA captured earlier that day.
14–16 December Fighting resumed on the morning of 14 December. Around 4:15 a.m., Thai provincial officials reported that Cambodian forces fired BM-21 rockets into
Kantharalak, Sisaket Province, with at least one rocket striking a residential house, killing a civilian. At 7:20 a.m., the RTMC captured the "Three House" casino complex on the border of Trat province. The area was alleged by the RTA to have encroached the Thai border for at least 40 years and is considered of military importance due to its usage as a base by the RCA. On 15 December, Cambodia claimed that the RTAF's F-16 fighter jets had struck near evacuee camps in Srei Snam district, Siem Reap province, more than 70 kilometers from the border causing more evacuations from the conflict area. At 12:00 a.m., the RTAF officially stated that the bombing targeted Cambodian weapon depots in the Banteay Meanchey. The RTA also announced that they have captured
Prasat Ta Khwai and Hill 500 at
Emerald Triangle, the latter resulted into the RTA captured a large number of Chinese-made
anti-tank missiles, including the
GAM-102 fire-and-forget ATGM. At 5:00 p.m. the Russian Embassy of Thailand released a statement denying the allegations of Russian mercenaries employed by Cambodia. On 16 December, Thai foreign minister
Sihasak Phuangketkeow stated during the interview that the
United Nations Security Council has not yet considered holding a special meeting regarding the conflict. Regarding the capture of Chinese-made weapons on Hill 500, Sihasak stated that the Chinese ambassador has clarified that the weapons delivered to Cambodia were old ones, and that they have not delivering any new arms, however "there may be various ways these weapons were obtained."
17–19 December On 17 December, two Thai soldiers, Private Wasan Khanhuathon and Sergeant Major Pornsak Iamsa-ad, were killed during an armed engagement between both forces in Sisaket and Sa Kaeo province. The Thai army clashed with the Cambodian army at "Hill 350" On 19 December, spokesperson for the Thai Defence Ministry Admiral Surasant Kongsiri denied Cambodia's claims regarding a downed RTAF F-16 fighter jet, and claims made on social media stating that "Thailand's military operations aimed to seize and annex Cambodian territory."
20–25 December After five days of continuous military operations, Thailand captured Hill 350 from Cambodia and recovered the bodies of two soldiers: Sergeant Major Samroeng Khlangprakhon and Private Phanupat Saorsa. On 22 December, footage emerged allegedly showing Thai soldiers toppling a statue of
Lord Vishnu situated 400 meters from the border line in An Ses area, Preah Vihear province received condemnation from Cambodian and Indian communities calling it 'disrespectful act' which hurt the sentiments of followers around the world. On 25 December at 9:00 a.m., Cambodian and Thai representative held a conference meeting at Pong Nam Rhon,
Chanthaburi province to discuss the potential ceasefire. That same day, the RTA released a statement regarding the video of a military-operated excavator knocking down a statue of the Hindu deity
Vishnu near the border area. The RTA stated that the act was "neither motivated by religious issue nor intended to be sarciligious" but as a part of an "administrative measure" to remove unauthorized religious buildings in the area.
Third ceasefire On the morning of 27 December, Thailand and Cambodia signed a new ceasefire agreement, which took effect at 12:00 p.m. local time. Prior to the ceasefire, Cambodia's defence ministry stated that the RTAF launched airstrikes on Serei Saophoan, Banteay Meachay, while the RTA stated that three soldiers were injured in clashes 30 minutes before the ceasefire. On 29 December, the RTA accused Cambodia of breaking the ceasefire by deploying more than 250 drones from their side of the border the previous evening. On 31 December, Thailand released 18 Cambodian POWs that it had held since July. Cambodian district and provincial officials told local media that following the ceasefire, Thai forces continued to erect razor wire and place shipping containers near four villages in Kork Romiet commune, which they said were located inside Cambodian territory. The officials claimed that a total of 292 hectares were affected, including residential and agricultural land, and that more than 1,300 houses were impacted, leaving many residents displaced. On January 6, 2026, the Thai army said in a statement, accusing Cambodian forces of firing mortar rounds into Thailand's Ubon Ratchathani province. One soldier was wounded by shrapnel. The Thai army said in a later statement that the Cambodian side had contacted a Thai military unit and claimed "there was no intention to fire into Thai territory," adding, "the incident was caused by an operational error by Cambodian personnel." The Thai military said it warned Cambodian forces to exercise caution, stressing if a similar incident occurred, Thailand may need to retaliate. Thailand has accused Cambodian soldiers of deliberately setting fires along the frontline forest areas to obscure visibility and move troops and equipment amid tensions along the Thai-Cambodian border. Alleged that Cambodian troops were cooperating with local villagers to ignite forest fires, describing the actions not as agricultural clearing but as a “tactical information filtering strategy.” the smoke was intended to reduce visibility and create cover for the movement of weapons and personnel. Thailand to review border MOUs with Cambodia as probe launched into missing flag incident in Chanthaburi. Thailand is preparing to review key border agreements with Cambodia while investigating an incident involving a missing Thai national flag in a disputed border area in Chanthaburi province. Deputy Prime Minister and Foreign Minister Sihasak Phuangketkeow said the issue will be discussed at a National Security Council (NSC) meeting on April 22, including possible moves to revoke Memorandums of Understanding (MOU) 2000 and 2001 governing border demarcation and cooperation. He stressed that any negotiations with Cambodia would only take place when Thailand is ready and on mutually agreed terms. . == Humanitarian impact and casualties ==