Cambodia Security Report — November 01, 2026

Security analysis based on open-source intelligence and web research. Period: October 25 — November 01, 2026.

Executive Summary

During the period of October 25 to November 01, 2026, Cambodia's security landscape was primarily shaped by persistent border tensions with Thailand, ongoing efforts in cybersecurity, and evolving diplomatic relations with major powers. The first anniversary of the Kuala Lumpur Peace Accords highlighted the unresolved nature of the Thai-Cambodian border dispute, with Cambodia accusing Thailand of continued military occupation and obstruction of displaced civilians. Concurrently, Cambodia demonstrated a strong commitment to regional cybersecurity cooperation and achieved a notable success in combating transnational cybercrime. Diplomatic ties with the United States continued to warm, marked by the reaffirmation of support for peace accords and plans for resuming joint military exercises in 2027, while relations with China remained robust, focusing on deepening strategic partnerships across various sectors. The nation also initiated mandatory military service applications, signaling a strategic focus on bolstering its national defense capabilities.

Key Security Developments

• Persistent Thai-Cambodian Border Dispute: On October 26, 2026, Cambodia marked the first anniversary of the Kuala Lumpur Peace Accords, with Prime Minister Hun Manet reaffirming the Kingdom's commitment to peaceful resolution of border disputes with Thailand. Despite the accord, Cambodia stated that parts of its territory remain occupied by the Thai military, and substantive negotiations have stalled for nearly a year. The Cambodian Ministry of Interior also accused Thailand of preventing approximately 20,000 to 24,000 displaced Cambodian civilians from returning to their homes in border areas.

• Dispute Over Border Temples and Artifacts: On October 25, 2026, Thailand's Culture Minister Sabida Thaised rejected Cambodia's demand for the return of artifacts from Prasat Ta Kwai and Prasat Khana, two temples on the Thai-Cambodian border, asserting Thai ownership. Cambodia's Ministry of Culture and Fine Arts had previously called for the return of objects from Prasat Khana and protested against alleged unauthorized Thai military activities at these and other border sites, accusing Thai forces of damaging cultural heritage and using cluster munitions in past fighting.

• Military Dialogue on Border Ceasefire: Military representatives from Cambodia and Thailand met on October 28, 2026, to discuss the implementation of the December 2025 ceasefire agreement. Both sides emphasized the importance of operational coordination and trust-building to achieve a peaceful settlement of disagreements, and discussions included a proposed hotline between Cambodian and Thai naval commanders to minimize misunderstandings.

• Enhanced Cybersecurity Cooperation: Cambodia reaffirmed its commitment to strengthening regional and international cybersecurity cooperation by participating in the 11th Singapore International Cyber Week (SICW) and the 11th ASEAN Ministerial Conference on Cybersecurity (AMCC), held from October 12 to 15, 2026. This participation highlighted Cambodia's focus on protecting critical information infrastructure and building a safer digital ecosystem.

• Success in Combating Cybercrime: On October 30, 2026, Cambodian authorities, in close cooperation with Singaporean law enforcement agencies, successfully intercepted and returned $12.8 million to a Singaporean fuel company. The company had fallen victim to a business email compromise (BEC) scam linked to cybercriminals operating from Cambodia. This incident underscores Cambodia's ongoing efforts to combat transnational cybercrime and prevent the country from being a "safe haven" for such activities.

• Upcoming Counter-Terrorism Conference: Phnom Penh is scheduled to host the International Conference on Counter Terrorism and Human Security (ICCTHS) on November 9-10, 2026. The notification of acceptance/rejection for papers for this conference was issued on October 28, 2026, indicating active preparations for this significant security event.

• Warming Diplomatic Relations with the US: On October 26, 2026, US Secretary of State Marco Rubio marked the first anniversary of the Kuala Lumpur Peace Accords, acknowledging President Donald Trump's role in brokering the agreement between Cambodia and Thailand and reaffirming US support for its implementation. This follows earlier announcements in August and September 2026 that Cambodia and the United States plan to resume their joint military exercises, "Angkor Sentinel 2027," in February 2027, after a decade-long suspension, signaling a positive trajectory in bilateral defense cooperation.

• Deepening Strategic Partnership with China: An international conference on the "New World Order" was held in Phnom Penh on October 31, 2026, co-organized by CamTech University, Sun Yat-sen University, and the China-ASEAN Studies Center. The forum discussed global geopolitics, regional cooperation, and the evolving dynamics of Cambodia-China relations, with participants expressing optimism for deepening the partnership for regional security and shared prosperity. China continues to be a crucial strategic partner, with ongoing discussions aimed at strengthening cooperation in trade, investment, infrastructure, defense coordination, security cooperation, and joint action against cross-border crime.

• Implementation of Mandatory Military Service: From October 1 to October 15, 2026, Cambodia began accepting applications for mandatory military service for men aged 18 to 25. This initiative follows the promulgation of a new Military Service Law on May 23, 2026, and aims to build a more capable and disciplined national defense force.

Geopolitical Impact and Regional Dynamics

The ongoing border dispute between Cambodia and Thailand continues to be a significant point of tension in Southeast Asia, directly impacting regional stability. Despite the Kuala Lumpur Peace Accords signed in October 2025, the lack of substantive progress in resolving territorial claims and the continued presence of Thai military in disputed areas, along with the humanitarian issue of displaced Cambodian civilians, underscore the fragility of peace in the immediate border region. This persistent friction necessitates continued diplomatic engagement from ASEAN and other international actors to prevent escalation.

Cambodia's warming diplomatic and defense relations with the United States, evidenced by the planned resumption of joint military exercises in 2027 and the US reaffirmation of support for the peace accords, represent a notable shift. This development could be interpreted as Cambodia seeking to diversify its strategic partnerships and potentially balance the strong influence of China. Such a rebalancing could introduce a new dynamic into the US-China competition for influence in Southeast Asia, with Cambodia navigating its relationships to maximize its national interests.

Concurrently, China remains a steadfast and deeply integrated strategic partner for Cambodia. The recent international conference in Phnom Penh, co-organized with Chinese institutions, highlights the ongoing intellectual and diplomatic engagement aimed at strengthening the "China-Cambodia all-weather community with a shared future." This robust relationship, encompassing economic, political, and security cooperation, solidifies China's strategic footprint in the region and provides Cambodia with significant development and defense support. The interplay between Cambodia's deepening ties with both the US and China will be a critical factor in shaping the broader strategic landscape of Southeast Asia.

Military and Defense Analysis

Cambodia's military and defense posture during this period reflects a dual focus on internal capacity building and strategic re-engagement with international partners. The most significant development is the implementation of mandatory military service, with applications commencing from October 1, 2026. This move, following the promulgation of a new Military Service Law in May 2026, indicates a strategic decision to enhance the size, discipline, and overall capability of the Royal Cambodian Armed Forces (RCAF). The government's stated aim is to build a more capable national defense force to protect sovereignty, territorial integrity, and peace in a rapidly changing security environment.

In terms of international military cooperation, the planned resumption of joint military exercises with the United States, "Angkor Sentinel 2027," in February 2027, marks a significant step in re-establishing defense ties after a decade-long suspension. These exercises aim to strengthen interoperability and disaster-response capabilities, reflecting a renewed momentum in Cambodia-US military cooperation. While specific details on defense spending trends were not available for this period, the commitment to mandatory service and renewed international drills suggest a continued investment in military modernization and training. Concerns regarding China's military presence at the Ream Naval Base persist among some international observers, although Cambodian officials consistently deny that China has exclusive rights to the base.

Outlook and Forecast

Short-term trends (1-3 months): In the immediate future, Cambodia is likely to continue its diplomatic efforts to resolve the border dispute with Thailand, emphasizing peaceful means and adherence to international law. The ongoing dialogue between military representatives, as seen on October 28, 2026, is expected to continue, focusing on ceasefire implementation and trust-building. Cybersecurity will remain a high priority, with Cambodia actively participating in regional forums and continuing its crackdown on online scam operations. The upcoming International Conference on Counter Terrorism and Human Security in Phnom Penh in November 2026 will further underscore this focus. Preparations for the "Angkor Sentinel 2027" joint military exercises with the US will likely intensify, signaling a continued warming of defense relations.

Critical flashpoints and risk areas: The Thai-Cambodian border remains the most critical flashpoint. The unresolved territorial claims, the continued presence of Thai military in disputed areas, and the humanitarian issue of displaced Cambodian civilians create a volatile environment. Any miscalculation or provocative action in these areas, particularly around disputed temples like Prasat Ta Kwai and Prasat Khana, could quickly escalate tensions. While not directly within Cambodia, the broader South China Sea dispute remains a significant regional dynamic that influences Cambodia's strategic calculations and its relations with major powers.

Indicators to monitor: Key indicators to monitor include any progress in the Thai-Cambodian Joint Boundary Commission meetings and the safe return of displaced civilians to their homes. The scope and scale of the upcoming "Angkor Sentinel 2027" exercises will provide insights into the depth of renewed US-Cambodia defense cooperation. Further announcements or activities related to China's presence at Ream Naval Base will also be crucial. Additionally, monitoring Cambodia's participation and outcomes in regional cybersecurity and counter-terrorism initiatives will indicate its commitment and effectiveness in these domains.

Strategic recommendations: Cambodia should prioritize sustained, high-level diplomatic engagement with Thailand to achieve a comprehensive and lasting resolution to the border dispute, ensuring the safe return of displaced populations. Enhancing transparency regarding all foreign military presence and activities within its territory, particularly at sensitive locations like Ream Naval Base, would help alleviate regional concerns and foster greater trust. Continued investment in cybersecurity infrastructure, human capital development, and international cooperation is essential to counter evolving cyber threats and protect its digital economy. Finally, Cambodia should strategically balance its relationships with major powers, leveraging both US and Chinese partnerships to enhance its security and development without compromising its sovereignty or regional stability.

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