Inside Cambodia’s foreign policy.

Cambodia’s foreign policy is formally non-aligned and ASEAN-centered, but in practice it is regime-security first and China-backed. The Ministry of Foreign Affairs says Cambodia follows the principles of independence, neutrality, peaceful coexistence, and non-interference under the Constitution, while also pursuing “multilateralism” and international law Ministry of Foreign Affairs and International Cooperation, Constitution of the Kingdom of Cambodia. Since Hun Manet became prime minister in August 2023 after a National Assembly vote, foreign policy has remained tightly aligned with the Cambodian People’s Party system built by Hun Sen, who now serves as Senate president and still carries major political weight Encyclopaedia Britannica, Reuters. That decision structure matters: the palace is symbolic, the foreign ministry executes, but the ruling party leadership sets the red lines. Cambodia’s interests pyramid is clear. Survival means avoiding military escalation on its borders, now visible in its 2026 move to use UNCLOS conciliation against Thailand over a maritime dispute rather than force The Diplomat, Khmer Times. Regime security means preserving CPP control and external backing against Western pressure on democracy and rights. Economic interest means attracting trade, infrastructure, tourism, and energy investment. Status means being seen as a credible ASEAN actor despite a reputation for following Beijing.

China is Cambodia’s pivotal bilateral relationship because it serves all but the last of those interests. Beijing is Cambodia’s largest source of foreign direct investment and a major aid and infrastructure partner, including under the Belt and Road framework Council for the Development of Cambodia, World Bank. Defense ties are unusually deep for Southeast Asia: Cambodia and China have conducted recurring “Golden Dragon” exercises, and Ream Naval Base has drawn sustained scrutiny from the United States over reports of Chinese military access, which Phnom Penh denies Reuters, U.S. Department of Defense. Vietnam and Laos matter differently. Vietnam is a necessary neighbor for border management, trade, and party-to-party ties, but historical mistrust limits how closely Phnom Penh can advertise the relationship ISEAS – Yusof Ishak Institute, Lowy Institute. Thailand is both an economic partner and a recurring sovereignty problem, especially around border and maritime delimitation, which is why the current dispute has gone into legal process rather than bilateral coercion The Diplomat. The United States, EU, and Japan remain important markets and donors, but those relationships are constrained whenever governance, repression, or Chinese basing issues move to the front European Commission, U.S. Department of State, Ministry of Foreign Affairs of Japan.

ASEAN is Cambodia’s main diplomatic shelter, and Phnom Penh consistently defends the organization’s norms of consensus and non-interference ASEAN. Cambodia also uses the UN and wider multilateral system to reinforce sovereignty claims and resist external political conditionality; its 2026 maritime filing shows it will invoke international legal machinery when useful to territorial interests, even while resisting intrusive scrutiny on domestic governance United Nations, The Diplomat. In UN voting, Cambodia generally aligns with developing-country positions on sovereignty and non-interference and often votes with ASEAN or broader Global South majorities on decolonization, development, and Palestine-related resolutions UN Digital Library, United Nations General Assembly Voting Data. The more revealing pattern is negative alignment: on high-salience resolutions involving China, Myanmar, or rights scrutiny, Cambodia tends to avoid positions that would sharply antagonize Beijing or normalize interventionist precedents Human Rights Watch, UN Digital Library.

Cambodia’s most important break from its bloc is inside ASEAN, where it has repeatedly diluted or blocked collective language when Chinese interests are directly engaged. During Cambodia’s 2012 ASEAN chairmanship, foreign ministers failed for the first time to issue a joint communiqué after disputes over South China Sea wording, a breakdown widely tied to Phnom Penh’s refusal to include language opposed by Beijing CSIS, Reuters. That was not an isolated event. Analysts tracking ASEAN diplomacy continue to identify Cambodia as one of the members least willing to support sharper collective positions on the South China Sea or Myanmar if those positions collide with Chinese preferences or the non-interference norm ISEAS – Yusof Ishak Institute, Crisis Group. This divergence is the key analytical point for MUN delegates: Cambodia does not simply “belong” to ASEAN, the Non-Aligned Movement, or even a generic developing-country