On the average, landmines and UXO maimed or killed over 600 Cambodians every month in 1992 when Cambodia and UNTAC established the Cambodian Mine Action Centre (CMAC) to rid the country of the calamity. The CMAC's humanitarian mandate is to clear land for resettlement of Internally Displaced People (IDP), agriculture, community development, and reconstruction of the national infrastructure.
Under the UNDP project of Assistance to Demining Programmes, CMAC grew rapidly from a small group of local deminers and a few international experts at the start in 1993 (when the group was known as MCTU), to a large national organization that employed close to 3,000 deminers and HQ personnel by June 1998. CMAC's organizational structure for the Executive is established on four functional areas: Mine Awareness, Mine Verification, Mine/ UXO Clearance and Training. The largest component of CMAC includes the CMAC demining platoons.

At its peak in 1999, there were 67 humanitarian demining platoons and three contract (development) demining platoons. Currently 48 normal and mobile platoons are deployed in six separate demining units in 8 different provinces. The CMAC function of minefield verification encompasses a number of discrete activities: survey, verification and mine marking. 18 EOD teams are deployed throughout the country to handle EOD tasks. In an important structural change accomplished during the year of 1999, Community Mine Marking has been moved under the Mine/UXO Awareness Branch. Training and re-training activities are now primarily conducted at the CMAC Training Centre in Kampong Chhnang.

The Royal Government of Cambodia has continued to be one of the most active supporters of the international movement to ban landmines. This was confirmed in 1997 when Cambodia became one of the signatories to the Ottawa Convention on the total ban of landmines - one of the most effective and widely supported international conventions ratified through the United Nations. Through tireless efforts by the Government and the Cambodian Mine Action Centre, with generous support and contributions from donor countries, CMAC has been able to free hazardous areas of mines and UXO totaling to more than 106 square kilometres from 1993 to May, 2003. CMAC has found and destroy- ed over 181,659 anti-personnel mines; 3,514 antitank mines and 750,887 items of UXO, and cleared over 273,732,034 fragments.