Cambodia is located on the southern part of the Indo-China peninsula in Southeast Asia. A former French colony, it was ruled for many years by Khmer Rouge communists.
With a population of 15.5 million people, Cambodia is led by Prime Minister Hun Sen, who has been in power in the capital Phnom Penh for more than 25 years.
The Mekong River in Southeast Asia flows for 4,350 kilometers from China to Vietnam through Laos, Myanmar, Thailand and Cambodia. China's construction of large hydropower dams to feed the country's growing energy needs is causing problems downriver, including dire impacts on the waters and fertile soil that feed hundreds of millions of people.