In Cambodia, the RCAF’s primary responsibilities are border, coastal, and internal security; since 2016, the RCAF has regularly conducted a small annual training exercise known as “Golden Dragon” with the military of China, its closest security partner

the RCAF was re-established in 1993 under the first coalition government from the merger of the Cambodian Government’s military forces (Cambodian People’s Armed Forces) and the two non-communist resistance forces (Sihanoukist National Army, aka National Army for Khmer Independence, and the Khmer People's National Liberation Armed Forces); thousands of communist Khmer Rouge fighters began surrendering by 1994 under a government amnesty program and the last of the Khmer Rouge forces (National Army of Democratic Kampuchea) were demobilized or absorbed into the RCAF in 1999

Cambodia continues to be one of the most densely landmine-contaminated countries in the world; by the early 1990s, various aid organizations estimated there were 8-10 million landmines scattered throughout the country, with a particularly heavy concentration on a 1,000-km (620-mile) strip along the northwest Thai-Cambodia border known as the "K5 belt"; the mines were laid during Cambodia’s decades-long war by the Cambodian army, the Vietnamese, the Khmer Rouge, the non-communist fighters, and US forces; part of Cambodia's defense policy is demining the territory with the intent of having the entire country cleared of unexploded ordnances by 2035; over 1 million landmines and over 3 million explosives were discovered and removed from 1992 to 2018; in 2018, the Cambodian government and Cambodian Mine Action and Victim Assistance Authority (CMAA), a government agency, launched the National Mine Action Strategy for 2018-2025 (2024)