Information: - France, officially the French Republic, is a country with territory in western Europe and several overseas regions and territories. The European, or metropolitan, area of France extends from the Mediterranean Sea to the English Channel and the North Sea, and from the Rhine to the Atlantic Ocean. Overseas France include French Guiana on the South American continent and several island territories in the Atlantic, Pacific and Indian oceans. France spans and had a total population of almost 67 million people as of January 2017. It is a unitary semi-presidential republic with the capital in Paris, the country's largest city and main cultural and commercial centre. Other major urban centres include Marseille, Lyon, Lille, Nice, Toulouse and Bordeaux. - The Khmer Republic (Khmer: ); also known as the State of Cambodia was the right-wing proUnited States military-led republican government of Cambodia that was formally declared on 9 October 1970. Politically, the Khmer Republic was headed by General Lon Nol and Prince Sisowath Sirik Matak that took power in the 18 March 1970 coup against Prince Norodom Sihanouk, then the country's head of state. - The Cambodian Civil War was a military conflict that pitted the forces of the Communist Party of Kampuchea (known as the Khmer Rouge) and their allies the Democratic Republic of Vietnam (North Vietnam) and the Viet Cong against the government forces of the Kingdom of Cambodia and, after October 1970, the Khmer Republic, which were supported by the United States (U.S.) and the Republic of Vietnam (South Vietnam). - Tonle Sap (, literally large river (tonle); fresh, not salty (sap), commonly translated to "Great Lake") refers to a seasonally inundated freshwater lake, the Tonle Sap Lake and an attached river, the long Tonle Sap River, that connects the lake to the Mekong. They form the central part of a complex hydrological system, situated in the Cambodian floodplain covered with a mosaic of natural and agricultural habitats that the Mekong replenishes with water and sediments annually. The central plain formation is the result of millions of years of Mekong alluvial deposition and discharge. From a geological perspective, the Tonle Sap Lake and Tonle Sap River are a current freeze-frame representation of the slowly, but ever shifting Lower Mekong Basin. Annual fluctuation of the Mekong's water volume, supplemented by the Asian Monsoon regime causes the unique flow reversal of the Tonle Sap River. - Cambodia (or Kampuchea ), officially known as the Kingdom of Cambodia (Preh Reacheanachak Kampchea), is a country located in the southern portion of the Indochina Peninsula in Southeast Asia. It is in area, bordered by Thailand to the northwest, Laos to the northeast, Vietnam to the east, and the Gulf of Thailand to the southwest. - The Mekong is a trans-boundary river in Southeast Asia. It is the world's 12th-longest river and the 7th-longest in Asia. Its estimated length is , and it drains an area of , discharging of water annually. - Operation Chenla I or Chenla One was a major military operation conducted by the Khmer National Armed Forces ( FANK ) during the Cambodian Civil War . It began on late August 1970 and ended in February 1971 , due to the FANK High Command 's decision to withdraw some units from Tang Kauk to protect Phnom Penh after Pochentong airbase was attacked . - Phnom Penh (or ), formerly known as Chaktomuk ("Four Faces"), is the capital and most populous city of Cambodia. Located on the banks of the Tonle Sap and Mekong River, Phnom Penh has been the national capital since French colonization of Cambodia, and has grown to become the nation's center of economic and industrial activities, as well as the center of security, politics, cultural heritage, and diplomacy of Cambodia. - Viet Cong, also known as the National Liberation Front, was a political organization and army that operated in South Vietnam and Cambodia during the Vietnam War. It was allied with North Vietnam and fought against the armies of South Vietnam and the United States. It had both guerrilla and regular army units, as well as a network of cadres who organized peasants in the territory it controlled. Many soldiers were recruited in South Vietnam, but others were from the North. During the war, communist leaders and anti-war spokesmen insisted the Viet Cong was an insurgency indigenous to the South, while the U.S. and South Vietnamese governments portrayed the group as a tool of Hanoi. Although the terminology distinguishes southerners from the northerners, the communist forces were under a single command structure set up in 1958. - The Khmer National Armed Forces, often abbreviated to FANK, were the official armed defense forces of the Khmer Republic, a short-lived state that existed from 1970 to 1975, known today as Cambodia. The FANK was the successor of the Royal Khmer Armed Forces (FARK) which had been responsible for the defense of the previous Kingdom of Cambodia since its independence in 1954 from France. - Khmers rouges (French for "Red Khmers" "Khmer Kraham"), more commonly known in English as Khmer Rouge, was the name given to the followers of the Communist Party of Kampuchea in Cambodia. It was formed in 1968 as an offshoot of the Vietnam People's Army from North Vietnam, and allied with North Vietnam, the Viet Cong, and the Pathet Lao during the Vietnam War against the anti-communist forces from 1968 to 1975. The Khmer Rouge emerged victorious in the Cambodian Civil War, overthrew the military dictatorship of the Khmer Republic and installed their own government Democratic Kampuchea in 1975, led by Pol Pot, Nuon Chea, Ieng Sary, Son Sen, and Khieu Samphan. This was followed by the Cambodian genocide from 1975 until 1979, when the Khmer Rouge were finally removed from power by Vietnam in the CambodianVietnamese War. The military power of the Khmer Rouge organization was not broken however, and a long era of guerrilla warfare involving large swaths of the Cambodian countryside began. Many different military factions were involved in the guerrilla war era and it ended around 1994. The Khmer Rouge organization is remembered especially for orchestrating the Cambodian genocide, which resulted from the enforcement of its social engineering policies. Its attempts at agricultural reform led to widespread famine, while its insistence on absolute self-sufficiency, even in the supply of medicine, led to the death of thousands from treatable diseases such as malaria. Arbitrary executions and torture carried out by its cadres against perceived subversive elements, or during purges of its own ranks between 1975 and 1978, are considered to have constituted genocide. Given the paragraphs above, decide what entity has the relation 'instance of' with 'conflict'.
operation chenla i