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Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the
Indochinese Peninsula Mainland Southeast Asia, also known as the Indochinese Peninsula or Indochina, is the continental portion of Southeast Asia. It lies east of the Indian subcontinent and south of Mainland China and is bordered by the Indian Ocean to the west an ...
in Southeast Asia, spanning an area of , bordered by Thailand to the northwest,
Laos Laos (, ''Lāo'' )), officially the Lao People's Democratic Republic ( Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ, French: République démocratique populaire lao), is a socialist ...
to the north, Vietnam to the east, and the
Gulf of Thailand The Gulf of Thailand, also known as the Gulf of Siam, is a shallow inlet in the southwestern South China Sea, bounded between the southwestern shores of the Indochinese Peninsula and the northern half of the Malay Peninsula. It is around in l ...
to the southwest. The
capital Capital may refer to: Common uses * Capital city, a municipality of primary status ** List of national capital cities * Capital letter, an upper-case letter Economics and social sciences * Capital (economics), the durable produced goods used f ...
and largest city is
Phnom Penh Phnom Penh (; km, ភ្នំពេញ, ) is the capital and most populous city of Cambodia. It has been the national capital since the French protectorate of Cambodia and has grown to become the nation's primate city and its economic, indus ...
. The sovereign state of Cambodia has a population of over 17 million. Buddhism is enshrined in the constitution as the official
state religion A state religion (also called religious state or official religion) is a religion or creed officially endorsed by a sovereign state. A state with an official religion (also known as confessional state), while not secular state, secular, is not n ...
, and is practised by more than 97% of the population. Cambodia's minority groups include Vietnamese, Chinese, Chams and 30 hill tribes. Cambodia has a tropical monsoon climate of two seasons, and the country is made up of a central floodplain around the Tonlé Sap lake and
Mekong Delta The Mekong Delta ( vi, Đồng bằng Sông Cửu Long, lit=Nine Dragon River Delta or simply vi, Đồng Bằng Sông Mê Kông, lit=Mekong River Delta, label=none), also known as the Western Region ( vi, Miền Tây, links=no) or South-weste ...
, surrounded by mountainous regions. The capital and largest city is
Phnom Penh Phnom Penh (; km, ភ្នំពេញ, ) is the capital and most populous city of Cambodia. It has been the national capital since the French protectorate of Cambodia and has grown to become the nation's primate city and its economic, indus ...
, the political, economic and cultural centre of Cambodia. The kingdom is an elective
constitutional monarchy A constitutional monarchy, parliamentary monarchy, or democratic monarchy is a form of monarchy in which the monarch exercises their authority in accordance with a constitution and is not alone in decision making. Constitutional monarchies di ...
with a monarch, currently
Norodom Sihamoni Norodom Sihamoni ( km, នរោត្តម សីហមុនី, ; born 14 May 1953) is King of Cambodia. He became King on 14 October 2004, a week after the abdication of his father, Norodom Sihanouk. He is the eldest son of Norodom Sihano ...
, chosen by the Royal Council of the Throne as head of state. The head of government is the Prime Minister, currently Hun Sen, the longest serving non-royal leader in Southeast Asia, who has ruled since 1985. The region now known as Cambodia has been inhabited since prehistoric times. In 802 AD, Jayavarman II declared himself king, uniting the warring Khmer princes of Chenla under the name "Kambuja".Chandler, David P. (1992) ''History of Cambodia''. Boulder, CO: Westview Press, . This marked the beginning of the Khmer Empire, which flourished for over 600 years. The Indianised kingdom facilitated the spread of first Hinduism and then Buddhism to much of Southeast Asia and undertook many religious infrastructural projects throughout the region.
Angkor Wat Angkor Wat (; km, អង្គរវត្ត, "City/Capital of Temples") is a temple complex in Cambodia and is the largest religious monument in the world, on a site measuring . Originally constructed as a Hinduism, Hindu temple dedicated ...
is the most famous of these structures and is designated as a World Heritage Site. In the fifteenth century, Cambodia experienced a decline of power, while its neighbors Vietnam and Thailand grew stronger. In 1863, Cambodia became a protectorate of France, and later was part of French Indochina. After a period of Japanese occupation during the Second World War, Cambodia gained independence from France in 1953. Despite Cambodia's neutrality, the Vietnam War extended into the country in 1965 via the Ho Chi Minh and Sihanouk trails. A 1970 coup installed the US-aligned
Khmer Republic The Khmer Republic ( km, សាធារណរដ្ឋខ្មែរ, ; french: République khmère) was a pro-United States military-led republican government of Cambodia that was formally declared on 9 October 1970. The Khmer Republic wa ...
, until being overthrown by the
Khmer Rouge The Khmer Rouge (; ; km, ខ្មែរក្រហម, ; ) is the name that was popularly given to members of the Communist Party of Kampuchea (CPK) and by extension to the regime through which the CPK ruled Cambodia between 1975 and 1979. ...
in 1975. The Khmer Rouge ruled the country and carried out the
Cambodian genocide The Cambodian genocide ( km, របបប្រល័យពូជសាសន៍នៅកម្ពុជា) was the systematic persecution and killing of Cambodians by the Khmer Rouge under the leadership of Communist Party of Kampuchea genera ...
from 1975 until 1979, when they were ousted in the Cambodian–Vietnamese War. The Vietnamese-occupied People's Republic of Kampuchea became the ''de facto'' government, with attempts to rebuild the country after the genocide mired by limited international recognition and ongoing conflict. Following the
1991 Paris Peace Accords The Paris Peace Agreements ( km, សន្ធិសញ្ញាសន្តិភាពទីក្រុងប៉ារីស ឆ្នាំ១៩៩១; french: Accords de paix de Paris), formally titled Comprehensive Cambodian Peace Agreeme ...
which formally ended the war with Vietnam, Cambodia was governed briefly by a United Nations mission (1992–93). The UN withdrew after holding elections in which around 90 percent of the registered voters cast ballots. The 1997 coup d'état consolidated power under Prime Minister Hun Sen and the Cambodian People's Party (CPP), who remain in power. Although constitutionally a multi-party state, the CPP dominates the
political system In political science, a political system means the type of political organization that can be recognized, observed or otherwise declared by a state. It defines the process for making official government decisions. It usually comprizes the govern ...
and dissolved its main opposition party in 2017, making Cambodia a ''de facto'' one-party state. The United Nations designates Cambodia as a least developed country. Cambodia is a member of the United Nations, ASEAN, the
RCEP The Regional Comprehensive Economic Partnership (RCEP ) is a free trade agreement among the Asia-Pacific nations of Australia, Brunei, Cambodia, China, Indonesia, Japan, South Korea, Laos, Malaysia, Myanmar, New Zealand, the Philippines, Sin ...
, the East Asia Summit, the WTO, the Non-Aligned Movement and La Francophonie. While per capita income remains low compared to most neighboring countries, Cambodia has one of the fastest-growing economies in Asia. Agriculture remains the dominant economic sector, with strong growth in textiles, construction, garments, and tourism leading to increased foreign investment and international trade. Rich in
biodiversity Biodiversity or biological diversity is the variety and variability of life on Earth. Biodiversity is a measure of variation at the genetic ('' genetic variability''), species ('' species diversity''), and ecosystem ('' ecosystem diversity' ...
and seasonal tropical forests, Cambodia has a high rate of deforestation and is considered among the most vulnerable countries to
climate change In common usage, climate change describes global warming—the ongoing increase in global average temperature—and its effects on Earth's climate system. Climate change in a broader sense also includes previous long-term changes to ...
.


Etymology

The ''Kingdom of Cambodia'' is the official English name of the country. The English ''Cambodia'' is an anglicisation of the French ''Cambodge'', which in turn is the French transliteration of the Khmer (, ). ''Kâmpŭchéa'' is the shortened alternative to the country's official name in Khmer (, . The Khmer
endonym An endonym (from Greek: , 'inner' + , 'name'; also known as autonym) is a common, ''native'' name for a geographical place, group of people, individual person, language or dialect, meaning that it is used inside that particular place, group, ...
''Kâmpŭchéa'' derives from the Sanskrit name ''Kambojadeśa'', composed of ''Deśa'' ("land of" or "country of") and (''Kamboja''), referring to the descendants of
Kambu Kambu Swayambhuva was an ancestor of the Punjabi Kambuja tribe and king of Aryadesa. He is listed and praised in shloka 22 of the Vedic ''Ekatmata Stotra'' hymn among Hindu sages, warriors and conquerors alongside Agastya, Narasimhavarman I, ...
(a legendary Indian sage from the ancient Indian kingdom of Kamboja), whose descendant Kaundinya I ''(Hùntián (混塡) and Preah Thong (Khmer: ព្រះថោង)),'' a warrior belonging to the Kamboja-Pala dynasty, ruling over the historical region of Kalinga, situated on the Eastern Coastal Plains, went to war with the Nāga
Queen Soma Soma ( km, សោមា, ) was the ruler of the Kingdom of Funan and widely claimed as the first monarch of Cambodia (reigned c. 1st century). She was also the first female leader of Cambodia. She was the consort of Kaundinya I (also known as "Hu ...
of the
Funan Funan (; km, ហ៊្វូណន, ; vi, Phù Nam, Chữ Hán: ) was the name given by Chinese cartographers, geographers and writers to an ancient Indianized state—or, rather a loose network of states ''(Mandala)''—located in mainla ...
region, resulting in a victory, which was eventually turned into a marriage proposal (holy union) by
Queen Soma Soma ( km, សោមា, ) was the ruler of the Kingdom of Funan and widely claimed as the first monarch of Cambodia (reigned c. 1st century). She was also the first female leader of Cambodia. She was the consort of Kaundinya I (also known as "Hu ...
herself, resulting in the foundation of the first ancient Khmer kingdom. The term ''Cambodia'' was already in use in Europe as early as 1524, since Antonio Pigafetta (an Italian explorer who followed Ferdinand Magellan in his circumnavigation of the globe) cites it in his work ''Relazione del primo viaggio intorno al mondo'' (1524–1525) as ''Camogia''. Scholar George Coedes refers to a 10th-century inscription of a Cambodian dynastic legend in which the hermit ''Kambu Swayambhuva'' and the celestial nymph ''Mera'' unite and establish the Cambodian ''Solar'' royal dynasty (Kambu-Mera), that begins with the Chenla ruler ''Srutavarman'' and his son ''Sreshthavarman''. Coedes suggests that the ''Kambu Swayambhuva'' legend has its origins in southern India, as a version of the Kanchi Pallava dynasty creation myth. Colloquially, Cambodians refer to their country as either ''Srok Khmer'' ( , ; meaning "Land of the Khmers"), or the slightly more formal (, ; "Country of Kampuchea"). The name ''Cambodia'' is used most often in the Western world while ''Kampuchea'' is more widely used in the East.


History


Pre-history

There exists sparse evidence for a Pleistocene human occupation of present-day Cambodia, which includes quartz and quartzite pebble tools found in terraces along the Mekong River, in
Stung Treng Stung Treng City ( km, ទីក្រុងស្ទឹងត្រែង) ( lo, ຊຽງແຕງ ) is the capital of Stung Treng Province, Cambodia. It is the major city (and capital) of both the district and province. Geography Stung Tren ...
and Kratié provinces, and in Kampot Province, although their dating is unreliable. Some slight archaeological evidence shows communities of
hunter-gatherer A traditional hunter-gatherer or forager is a human living an ancestrally derived lifestyle in which most or all food is obtained by foraging, that is, by gathering food from local sources, especially edible wild plants but also insects, fungi, ...
s inhabited the region during Holocene: the most ancient archaeological discovery site in Cambodia is considered to be the cave of Laang Spean, in Battambang Province, which belongs to the Hoabinhian period. Excavations in its lower layers produced a series of radiocarbon dates around 6000 BC. Upper layers in the same site gave evidence of transition to Neolithic, containing the earliest dated earthenware ceramics in Cambodia. Archaeological records for the period between Holocene and Iron Age remain equally limited. A pivotal event in Cambodian prehistory was the slow penetration of the first rice farmers from the north, which began in the late third millennium BC., pp.13–22 The most curious prehistoric evidence in Cambodia are the various "circular earthworks" discovered in the red soils near
Memot Memot District ( km, ស្រុកមេមត់) is a district (''srok'') in Tboung Khmum Province, Cambodia. The district capital is Memot town, around east of the provincial capital of Kampong Cham by road. Memot is a border district and ...
and in the adjacent region of Vietnam in the latter 1950s. Their function and age are still debated, but some of them possibly date from second millennium BC. Other prehistoric sites of somewhat uncertain date are ''Samrong Sen'' (not far from the ancient capital of
Oudong ( km, ឧដុង្គ; also romanized as Udong or Odong) is a former town of the post-Angkorian period (1618–1863) situated in present-day ''Phsar Daek'' Commune, Ponhea Lueu District, Kandal Province, Cambodia. Located at the foothill of th ...
), where the first investigations began in 1875,, p.120 and ''Phum Snay'', in the northern province of Banteay Meanchey. An excavation at Phum Snay revealed 21 graves with iron weapons and cranial trauma which could point to conflicts in the past, possible with larger cities in Angkor. Prehistoric artefacts are often found during mining activities in Ratanakiri. Iron was worked by about 500 BC, with supporting evidence coming from the Khorat Plateau, in modern-day Thailand. In Cambodia, some Iron Age settlements were found beneath Baksei Chamkrong and other Angkorian temples while circular earthworks at the site of Lovea a few kilometres north-west of Angkor. Burials, much richer than other types of finds, testify to improvement of food availability and trade (even on long distances: in the 4th century BC trade relations with India were already opened) and the existence of a social structure and labour organisation.Carter, A. K. (2011). Trade and Exchange Networks in Iron Age Cambodia: Preliminary Results from a Compositional Analysis of Glass Beads. Bulletin of the Indo-Pacific Prehistory Association, 30, 178–188. Among the artifacts from the Iron Age, glass beads are important evidence. Different kinds of glass beads recovered from several sites across Cambodia, such as the Phum Snay site in the northwest and the Prohear site in the southeast, show that there were two main trading networks at the time. The two networks were separated by time and space, which indicate that there was a shift from one network to the other at about 2nd–4th century AD, probably with changes in socio-political powers.


Pre-Angkorian and Angkorian era

During the 3rd, 4th, and 5th centuries, the Indianised states of
Funan Funan (; km, ហ៊្វូណន, ; vi, Phù Nam, Chữ Hán: ) was the name given by Chinese cartographers, geographers and writers to an ancient Indianized state—or, rather a loose network of states ''(Mandala)''—located in mainla ...
and its successor, Chenla, coalesced in present-day Cambodia and southwestern Vietnam. For more than 2,000 years, what was to become Cambodia absorbed influences from India, passing them on to other Southeast Asian civilisations that are now Thailand and Laos. Little else is known for certain of these polities, however Chinese chronicles and tribute records do make mention of them. It is believed that the territory of Funan may have held the port known to Alexandrian geographer Claudius Ptolemy as " Kattigara". The Chinese chronicles suggest that after Jayavarman I of Chenla died around 681, turmoil ensued which resulted in the division of the kingdom into Land Chenla and Water Chenla which was loosely ruled by weak princes under the dominion of Java. The Khmer Empire grew out of these remnants of Chenla, becoming firmly established in 802 when Jayavarman II (reigned – ) declared independence from Java and proclaimed himself a Devaraja. He and his followers instituted the cult of the God-king and began a series of conquests that formed an empire which flourished in the area from the 9th to the 15th centuries. During the rule of
Jayavarman VIII Jayavarman VIII ( km, ជ័យវរ្ម័នទី៨), posthumous name Paramesvarapada, was one of the prominent kings of the Khmer empire. His rule lasted from 1243 until 1295, when he abdicated. One of his wives was Queen Chakravartirajad ...
the Angkor empire was attacked by the Mongol army of
Kublai Khan Kublai ; Mongolian script: ; (23 September 1215 – 18 February 1294), also known by his temple name as the Emperor Shizu of Yuan and his regnal name Setsen Khan, was the founder of the Yuan dynasty of China and the fifth khagan-emperor of th ...
, however, the king was able to buy peace. Around the 13th century, Theravavada missionaries from
Sri Lanka Sri Lanka (, ; si, ශ්‍රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an ...
reintroduced Theravada Buddhism to Southeast Asia; having sent missionaries previously in 1190s. The religion spread and eventually displaced Hinduism and Mahayana Buddhism as the popular religion of Angkor; however it was not the official state religion until 1295 when Indravarman III took power. The Khmer Empire was Southeast Asia's largest empire during the 12th century. The empire's centre of power was Angkor, where a series of capitals were constructed during the empire's zenith. In 2007 an international team of researchers using satellite photographs and other modern techniques concluded that Angkor had been the largest pre-industrial city in the world with an urban sprawl of . The city, which could have supported a population of up to one million people and
Angkor Wat Angkor Wat (; km, អង្គរវត្ត, "City/Capital of Temples") is a temple complex in Cambodia and is the largest religious monument in the world, on a site measuring . Originally constructed as a Hinduism, Hindu temple dedicated ...
, the best known and best-preserved religious temple at the site, still serves as a reminder of Cambodia's past as a major regional power. The empire, though in decline, remained a significant force in the region until its fall in the 15th century.


Post-Angkor Period

After a long series of wars with neighbouring kingdoms, Angkor was sacked by the
Ayutthaya Kingdom The Ayutthaya Kingdom (; th, อยุธยา, , IAST: or , ) was a Siamese kingdom that existed in Southeast Asia from 1351 to 1767, centered around the city of Ayutthaya, in Siam, or present-day Thailand. The Ayutthaya Kingdom is conside ...
and abandoned in 1432 because of ecological failure and infrastructure breakdown. Chandler, David P. (1991) ''The Land and the People of Cambodia'', HarperCollins. New York, New York. p. 77, . This led to a period of economic, social, and cultural stagnation when the kingdom's internal affairs came increasingly under the control of its neighbours. By this time, the Khmer penchant for monument building had ceased. Older faiths such as
Mahayana Buddhism ''Mahāyāna'' (; "Great Vehicle") is a term for a broad group of Buddhist traditions, texts, philosophies, and practices. Mahāyāna Buddhism developed in India (c. 1st century BCE onwards) and is considered one of the three main existing bra ...
and the
Hindu Hindus (; ) are people who religiously adhere to Hinduism.Jeffery D. Long (2007), A Vision for Hinduism, IB Tauris, , pages 35–37 Historically, the term has also been used as a geographical, cultural, and later religious identifier for ...
cult of the god-king had been supplanted by Theravada Buddhism. The court moved the capital to
Longvek Longvek or Lavek ( km, លង្វែក, or , ; meaning "intersection" or "crossroads") was a city in Cambodia. It was the second capital city during the Cambodia's Post-Angkor period which began after the Angkor era. The city was known to ear ...
where the kingdom sought to regain its glory through maritime trade. The first mention of Cambodia in European documents was in 1511 by the Portuguese. Portuguese travellers described the city as a place of flourishing wealth and foreign trade. Continued wars with Ayutthaya and the Vietnamese resulted in the loss of more territory and Longvek being conquered and destroyed by King Naresuan the Great of Ayutthaya in 1594. A new Khmer capital was established at
Oudong ( km, ឧដុង្គ; also romanized as Udong or Odong) is a former town of the post-Angkorian period (1618–1863) situated in present-day ''Phsar Daek'' Commune, Ponhea Lueu District, Kandal Province, Cambodia. Located at the foothill of th ...
south of Longvek in 1618, but its monarchs could survive only by entering into what amounted to alternating vassal relationships with the Siamese and Vietnamese for the next three centuries with only a few short-lived periods of relative independence. The hill tribe people in Cambodia were "hunted incessantly and carried off as
slaves Slavery and enslavement are both the state and the condition of being a slave—someone forbidden to quit one's service for an enslaver, and who is treated by the enslaver as property. Slavery typically involves slaves being made to perf ...
by the Siamese (Thai), the Annamites (Vietnamese), and the Cambodians". In the nineteenth century, a renewed struggle between Siam and Vietnam for control of Cambodia resulted in a period when Cambodia became the Tây Thành Province of Nguyễn Vietnam, during which Vietnamese officials attempted to force the
Khmers The Khmer people ( km, ជនជាតិខ្មែរ, ) are a Southeast Asian ethnic group native to Cambodia. They comprise over 90% of Cambodia's population of 17 million.
to adopt Vietnamese customs. This led to several rebellions against the Vietnamese and appeals to Thailand for assistance. The Siamese–Vietnamese War (1841–1845) ended with an agreement to place the country under joint suzerainty. This later led to the signing of a treaty for French Protection of Cambodia by King Norodom Prohmborirak.


French colonisation

In 1863, King Norodom, who had been installed by Siam, sought the protection of Cambodia from Siam by French rule. In 1867, Rama IV signed a treaty with France, renouncing
suzerainty Suzerainty () is the rights and obligations of a person, state or other polity who controls the foreign policy and relations of a tributary state, while allowing the tributary state to have internal autonomy. While the subordinate party is cal ...
over Cambodia in exchange for the control of Battambang and
Siem Reap Siem Reap ( km, សៀមរាប, ) is the second-largest city of Cambodia, as well as the capital and largest city of Siem Reap Province in northwestern Cambodia. Siem Reap has French colonial and Chinese-style architecture in the Old F ...
provinces which officially became part of Siam. The provinces were ceded back to Cambodia by a border treaty between France and Siam in 1907. Cambodia continued as a protectorate of France from 1867 to 1953, administered as part of the colony of French Indochina, though occupied by the Japanese empire from 1941 to 1945. and briefly existing as the puppet state of Kingdom of Kampuchea in mid-1945. Between 1874 and 1962, the total population increased from about 946,000 to 5.7 million.Cambodia – Population
.
Library of Congress Country Studies The Country Studies are works published by the Federal Research Division of the United States Library of Congress, freely available for use by researchers. No copyright is claimed on them. Therefore, they have been dedicated to the public domain a ...
.
After King Norodom's death in 1904, France manipulated the choice of king, and Sisowath, Norodom's brother, was placed on the throne. The throne became vacant in 1941 with the death of Monivong, Sisowath's son, and France passed over Monivong's son, Monireth, feeling he was too independently minded. Instead,
Norodom Sihanouk Norodom Sihanouk (; km, នរោត្តម សីហនុ, ; 31 October 192215 October 2012) was a Cambodian statesman, Sangkum and FUNCINPEC politician, Norodom Sihanouk filmography, film director, and composer who led Cambodia in vari ...
, a maternal grandson of King Sisowath was enthroned. The French thought young Sihanouk would be easy to control. They were wrong, however, and under the reign of King Norodom Sihanouk, Cambodia gained independence from France on 9 November 1953.


Independence and Vietnam War

Cambodia became a constitutional monarchy under King
Norodom Sihanouk Norodom Sihanouk (; km, នរោត្តម សីហនុ, ; 31 October 192215 October 2012) was a Cambodian statesman, Sangkum and FUNCINPEC politician, Norodom Sihanouk filmography, film director, and composer who led Cambodia in vari ...
. When French Indochina was given independence, Cambodia lost hope of regaining control over the
Mekong Delta The Mekong Delta ( vi, Đồng bằng Sông Cửu Long, lit=Nine Dragon River Delta or simply vi, Đồng Bằng Sông Mê Kông, lit=Mekong River Delta, label=none), also known as the Western Region ( vi, Miền Tây, links=no) or South-weste ...
as it was awarded to Vietnam. Formerly part of the Khmer Empire, the area had been controlled by the Vietnamese since 1698, with King Chey Chettha II granting the Vietnamese permission to settle in the area decades before. This remains a diplomatic sticking point with over one million ethnic Khmers (the
Khmer Krom The ''Khmer Krom'' ( km, ជនជាតិខ្មែរក្រោម, , , lit. 'Lower Khmers' or 'Southern Khmers'; vi, người Khơ-me Crộm, người Khmer Nam Bộ, người Khmer Việt Nam, người Việt gốc Miên (used before 19 ...
) still living in this region. The Khmer Rouge attempted invasions to recover the territory which, in part, led to Vietnam's invasion of Cambodia and deposition of the Khmer Rouge. In 1955, Sihanouk abdicated in favour of his father to participate in politics and was elected prime minister. Upon his father's death in 1960, Sihanouk again became head of state, taking the title of prince. As the Vietnam War progressed, Sihanouk adopted an official policy of
neutrality Neutral or neutrality may refer to: Mathematics and natural science Biology * Neutral organisms, in ecology, those that obey the unified neutral theory of biodiversity Chemistry and physics * Neutralization (chemistry), a chemical reaction ...
in the
Cold War The Cold War is a term commonly used to refer to a period of Geopolitics, geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc. The term ''Cold war (term), co ...
. Sihanouk allowed the Vietnamese communists to use Cambodia as a sanctuary and a supply route for their arms and other aid to their armed forces fighting in South Vietnam. This policy was perceived as humiliating by many Cambodians. In December 1967 Washington Post journalist Stanley Karnow was told by Sihanouk that if the US wanted to bomb the Vietnamese communist sanctuaries, he would not object unless Cambodians were killed. The same message was conveyed to US President Johnson's emissary Chester Bowles in January 1968. However, in public Sihanouk refuted the right of the U.S. to use air strikes in Cambodia, and on 26 March he said "these criminal attacks must immediately and definitively stop". On 28 March a press conference was held and Sihanouk appealed to the international media: "I appeal to you to publicise abroad this very clear stand of Cambodia—that is, I will, in any case, oppose all bombings on Cambodian territory under whatever pretext." Nevertheless, the public pleas of Sihanouk were ignored and the bombing continued. Members of the government and army became resentful of Sihanouk's ruling style as well as his tilt away from the United States.


Khmer Republic (1970–75)

While visiting Beijing in 1970 Sihanouk was ousted by a military coup led by Prime Minister General Lon Nol and Prince Sisowath Sirik Matak. US support for the coup remains unproven. However, once the coup was completed, the new regime, which immediately demanded that the Vietnamese communists leave Cambodia, gained the political support of the United States. The North Vietnamese and Viet Cong forces, desperate to retain their sanctuaries and supply lines from North Vietnam, immediately launched armed attacks on the new government. The king urged his followers to help in overthrowing this government, hastening the onset of civil war. Soon
Khmer Rouge The Khmer Rouge (; ; km, ខ្មែរក្រហម, ; ) is the name that was popularly given to members of the Communist Party of Kampuchea (CPK) and by extension to the regime through which the CPK ruled Cambodia between 1975 and 1979. ...
rebels began using him to gain support. However, from 1970 until early 1972, the Cambodian conflict was largely one between the government and army of Cambodia, and the armed forces of North Vietnam. As they gained control of Cambodian territory, the Vietnamese communists imposed a new political infrastructure, which was eventually dominated by the Cambodian communists now referred to as the Khmer Rouge. Between 1969 and 1973, Republic of Vietnam and US forces bombed Cambodia in an effort to disrupt the Viet Cong and Khmer Rouge. Documents uncovered from the Soviet archives after 1991 reveal that the North Vietnamese attempt to overrun Cambodia in 1970 was launched at the explicit request of the Khmer Rouge and negotiated by
Pol Pot Pol Pot; (born Saloth Sâr;; 19 May 1925 – 15 April 1998) was a Cambodian revolutionary, dictator, and politician who ruled Cambodia as Prime Minister of Democratic Kampuchea between 1976 and 1979. Ideologically a Marxist–Leninist a ...
's then second in command, Nuon Chea. NVA units overran many Cambodian army positions while the Communist Party of Kampuchea (CPK) expanded their small-scale attacks on lines of communication. In response to the North Vietnamese invasion, US President Richard Nixon announced that US and South Vietnamese ground forces had entered Cambodia in a campaign aimed at destroying NVA base areas in Cambodia (see Cambodian Incursion). Although a considerable quantity of equipment was seized or destroyed by US and South Vietnamese forces, containment of North Vietnamese forces proved elusive. The Khmer Republic's leadership was plagued by disunity among its three principal figures: Lon Nol, Sihanouk's cousin Sirik Matak, and National Assembly leader In Tam. Lon Nol remained in power in part because neither of the others was prepared to take his place. In 1972, a constitution was adopted, a parliament elected, and Lon Nol became president. But disunity, the problems of transforming a 30,000-man army into a national combat force of more than 200,000 men, and spreading corruption weakened the civilian administration and army. The Communist insurgency inside Cambodia continued to grow, aided by supplies and military support from North Vietnam. Pol Pot and Ieng Sary asserted their dominance over the Vietnamese-trained communists, many of whom were purged. At the same time, the CPK forces became stronger and more independent of their Vietnamese patrons. By 1973, the CPK were fighting battles against government forces with little or no North Vietnamese troop support, and they controlled nearly 60% of Cambodia's territory and 25% of its population. The government made three unsuccessful attempts to enter into negotiations with the insurgents, but by 1974, the CPK were operating openly as divisions, and some of the NVA combat forces had moved into South Vietnam. Lon Nol's control was reduced to small enclaves around the cities and main transportation routes. More than 2 million refugees from the war lived in
Phnom Penh Phnom Penh (; km, ភ្នំពេញ, ) is the capital and most populous city of Cambodia. It has been the national capital since the French protectorate of Cambodia and has grown to become the nation's primate city and its economic, indus ...
and other cities. On New Year's Day 1975, Communist troops launched an offensive which, in 117 days of the hardest fighting of the war, led to the collapse of the Khmer Republic. Simultaneous attacks around the perimeter of Phnom Penh pinned down Republican forces, while other CPK units overran fire bases controlling the vital lower Mekong resupply route. A US-funded airlift of ammunition and rice ended when Congress refused additional aid for Cambodia. The Lon Nol government in Phnom Penh surrendered on 17 April 1975, just five days after the US mission evacuated Cambodia.


Khmer Rouge regime, 1975–1978

The Khmer Rouge reached
Phnom Penh Phnom Penh (; km, ភ្នំពេញ, ) is the capital and most populous city of Cambodia. It has been the national capital since the French protectorate of Cambodia and has grown to become the nation's primate city and its economic, indus ...
and took power in 1975. Led by
Pol Pot Pol Pot; (born Saloth Sâr;; 19 May 1925 – 15 April 1998) was a Cambodian revolutionary, dictator, and politician who ruled Cambodia as Prime Minister of Democratic Kampuchea between 1976 and 1979. Ideologically a Marxist–Leninist a ...
, they changed the official name of the country to Democratic Kampuchea. The new regime modelled itself on Maoist China during the
Great Leap Forward The Great Leap Forward (Second Five Year Plan) of the People's Republic of China (PRC) was an economic and social campaign led by the Chinese Communist Party (CCP) from 1958 to 1962. CCP Chairman Mao Zedong launched the campaign to reconstruc ...
, immediately evacuated the cities, and sent the entire population on forced marches to rural work projects. They attempted to rebuild the country's agriculture on the model of the 11th century, discarded Western medicine, and destroyed temples, libraries, and anything considered Western. Estimates as to how many people were killed by the Khmer Rouge regime range from approximately one to three million; the most commonly cited figure is two million (about a quarter of the population). cf. This era gave rise to the term
Killing Fields The Killing Fields ( km, វាលពិឃាត, ) are a number of sites in Cambodia where collectively more than one million people were killed and buried by the Khmer Rouge regime (the Communist Party of Kampuchea) during its rule of t ...
, and the prison Tuol Sleng became notorious for its history of mass killing. Hundreds of thousands fled across the border into neighbouring Thailand. The regime disproportionately targeted
ethnic minority The term 'minority group' has different usages depending on the context. According to its common usage, a minority group can simply be understood in terms of demographic sizes within a population: i.e. a group in society with the least number o ...
groups. The Cham Muslims suffered serious purges with as much as half of their population exterminated. Pol Pot was determined to keep his power and disenfranchise any enemies or potential threats, and thus increased his violent and aggressive actions against his people. Forced repatriation in 1970 and deaths during the Khmer Rouge era reduced the Vietnamese population in Cambodia from between 250,000 and 300,000 in 1969 to a reported 56,000 in 1984. However, most of the victims of the Khmer Rouge regime were not ethnic minorities but ethnic Khmer. Professionals, such as doctors, lawyers and teachers, were also targeted. According to Robert D. Kaplan, "eyeglasses were as deadly as the yellow star" as they were seen as a sign of intellectualism.Kaplan, Robert D. (1996) ''The Ends of the Earth'', Vintage, 1996, p. 406, . Religious institutions were targeted by the Khmer Rouge particularly fiercely. Religion was so viciously persecuted to such a terrifying extent that the vast majority of Cambodia's historic architecture, 95% of Cambodia's Buddhist temples, was completely destroyed.


Vietnamese occupation and transition, 1978–1992

In November 1978, Vietnamese troops invaded Cambodia in response to border raids by the Khmer Rouge. The People's Republic of Kampuchea (PRK), a pro-Soviet state led by the Kampuchean People's Revolutionary Party, a party created by the Vietnamese in 1951, and led by a group of Khmer Rouge who had fled Cambodia to avoid being purged by Pol Pot and Ta Mok, was established. It was fully beholden to the occupying Vietnamese army and under the direction of the Vietnamese ambassador to Phnom Penh. Its arms came from Vietnam and the Soviet Union.Bultmann, Daniel (2015) ''Inside Cambodian Insurgency. A Sociological Perspective on Civil Wars and Conflict'', Ashgate: Burlington, VT/Farnham, UK, . In opposition to the newly created state, a government-in-exile referred to as the Coalition Government of Democratic Kampuchea (CGDK) was formed in 1981 from three factions. This consisted of the Khmer Rouge, a royalist faction led by Sihanouk, and the Khmer People's National Liberation Front. Its credentials were recognised by the United Nations. The Khmer Rouge representative to the UN, Thiounn Prasith, was retained, but he had to work in consultation with representatives of the noncommunist Cambodian parties. The refusal of Vietnam to withdraw from Cambodia led to economic sanctions by the US and its allies. Peace efforts began in Paris in 1989 under the State of Cambodia, culminating two years later in October 1991 in a Paris Comprehensive Peace Settlement. The UN was given a mandate to enforce a ceasefire and deal with refugees and disarmament known as the United Nations Transitional Authority in Cambodia (UNTAC).


Modern Cambodia (1993–present)

In 1993, the monarchy was restored with
Norodom Sihanouk Norodom Sihanouk (; km, នរោត្តម សីហនុ, ; 31 October 192215 October 2012) was a Cambodian statesman, Sangkum and FUNCINPEC politician, Norodom Sihanouk filmography, film director, and composer who led Cambodia in vari ...