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9 states1820 CE – 2024 CE

Modern States of Mainland Southeast Asia: Map & History

9 states of Mainland Southeast Asia on one map, from 1820 CE to 2024 CE.The largest, Vichy France, covered about 11,922,201 km²; the longest-lived, Burma, lasted 1820 CE – 1989 CE. Each has its own section below with its rulers, capitals, wars and pictures where the records hold them.

သံဃာ အပါး၅၀၀၀ဆွမ်းလောင်းလှူပွဲတော်
Wine Su11 · CC BY-SA 4.0 · Commons
Second cabinet of Philippe Pétain, 1940
Unknown authorUnknown author · Public domain · Commons
The Resistance Coalition Government of the Democratic Republic of Vietnam
Vietnam Government · Public domain · Commons
Angkor Wat, Cambodia, as seen from the west entrance
Manfred Werner (talk · contribs) · CC BY-SA 3.0 · Commons
Base map
1820 AD
1956 AD
2024 AD
1820 AD
1875 AD
1925 AD
1975 AD
2024 AD
Epochs:
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Each state in its own colour. Move the timeline to see which existed in any year from 1820 to 2024; select a territory to read about it. Borders: Cliopatria / Seshat (CC BY 4.0).

The Modern States of Mainland Southeast Asia Compared

StateYearsCapitalLargest extentRulers
Burma1820 CE – 1989 CENaypyidaw797,916 km²10
Vichy France1940 CE – 1944 CEParis11,922,201 km²1
Democratic Republic of Vietnam1956 CE – 1975 CEHanoi186,286 km²2
Kingdom of Cambodia1956 CE – 2024 CEPhnom Penh184,307 km²14
Kingdom of Laos1956 CE – 1975 CEVientiane (administrative), Luang Phabang (royal)229,137 km²2
Republic of Vietnam1956 CE – 1975 CESaigon180,020 km²4
Communist Laos1976 CE – 2024 CEVientiane229,246 km²8
Khmer Rouge1976 CE – 1978 CE–184,307 km²1
People's Republic of Kampuchea1979 CE – 1995 CEPhnom Penh184,307 km²1

Timeline of the Modern States of Mainland Southeast Asia

When each state existed, 1820 CE to 2024 CE. Select a year to see the map then.

  1. Burma
    1820 CE – 1989 CE
  2. Vichy France
    1940 CE – 1944 CE
  3. Democratic Republic of Vietnam
    1956 CE – 1975 CE
  4. Kingdom of Cambodia
    1956 CE – 2024 CE
  5. Kingdom of Laos
    1956 CE – 1975 CE
  6. Republic of Vietnam
    1956 CE – 1975 CE
  7. Communist Laos
    1976 CE – 2024 CE
  8. Khmer Rouge
    1976 CE – 1978 CE
  9. People's Republic of Kampuchea
    1979 CE – 1995 CE

The 9 States

Burma

1820 CE – 1989 CE · Capital: Naypyidaw · 797,916 km²

သံဃာ အပါး၅၀၀၀ဆွမ်းလောင်းလှူပွဲတော်
သံဃာ အပါး၅၀၀၀ဆွမ်းလောင်းလှူပွဲတော် Wine Su11 · CC BY-SA 4.0 · Commons

Myanmar, officially the Republic of the Union of Myanmar and also referred to as Burma (the official English name until 1989), is a country in northwest Southeast Asia. It is the largest country by area in Mainland Southeast Asia and has a population of about 55 million. It is bordered by India and Bangladesh to the northwest, China to the northeast, Laos and Thailand to the east and southeast, and the Andaman Sea and the Bay of Bengal to the south and southwest. The country's capital city is Naypyidaw, while its largest city is Yangon (formerly Rangoon).

From Wikipedia: Myanmar (CC BY-SA 4.0)

Origins and Founding

Archaeological evidence shows that Homo erectus lived in the region now known as Myanmar as early as 750,000 years ago, with no more erectus finds after 75,000 years ago. The first evidence of Homo sapiens is dated to about 25,000 BP with discoveries of stone tools in central Myanmar. Evidence of Neolithic age domestication of plants and animals and the use of polished stone tools dating to sometime between 10,000 and 6,000 BCE has been discovered in the form of cave paintings in Padah-Lin Caves.

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The Bronze Age arrived c. 1500 BCE when people in the region were turning copper into bronze, growing rice and domesticating poultry and pigs; they were among the first people in the world to do so. Human remains and artefacts from this era were discovered in Monywa District in the Sagaing Region.

From Wikipedia: Myanmar · History: Prehistory (CC BY-SA 4.0)

Founded
1820 CE

Rulers

Government, Society and Religion

There is consensus that the former military regime in Myanmar (1962–2010) was one of the world's most repressive and abusive regimes. In November 2012, Samantha Power, Barack Obama's Special Assistant to the President on Human Rights, wrote on the White House blog that "Serious human rights abuses against civilians in several regions continue, including against women and children." Members of the United Nations and major international human rights organisations have issued repeated and consistent reports of widespread and systematic human rights violations in Myanmar.

From Wikipedia: Myanmar · Government and politics: Human rights and internal conflicts (CC BY-SA 4.0)

Government
Unitary assembly-independent republic
Languages
Burmese
Religion
#invoke:list, unbulleted

Economy and Trade

Myanmar's economy is one of the fastest growing economies in the world, with a nominal GDP of US$76.09 billion in 2019 and an estimated purchasing power-adjusted GDP of US$327.629 billion in 2017 according to the World Bank. Foreigners can legally lease but not own property. In December 2014, Myanmar set up its first stock exchange, the Yangon Stock Exchange.

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The informal economy's share in Myanmar is one of the biggest in the world and is closely linked to corruption, smuggling, and illegal trade activities. In addition, decades of civil war and unrest have contributed to Myanmar's current levels of poverty and lack of economic progress. Myanmar lacks adequate infrastructure. Goods travel primarily across the Thai border (where most illegal drugs are exported) and along the Irrawaddy River.

From Wikipedia: Myanmar · Economy (CC BY-SA 4.0)

Coins, Currency and Symbols

Burma (Myanmar) Kyat// not in use
Burma (Myanmar) Kyat// not in use Hynek Moravec · CC BY-SA 3.0 · Commons
Currency
kyat, Burmese rupee
  • Flag of Myanmar
    Flag of Myanmar Unknown authorUnknown author · Public domain · Commons
  • State Seal of the Republic of the Union of Myanmar
    State Seal of the Republic of the Union of Myanmar File:State seal of Myanmar.png: Unknown authorUnknown author derivative work: Pho Sai · Public domain · Commons

Wars and Battles

On 2 March 1962, the military led by General Ne Win took control of Burma through a coup d'état, and the government has been under direct or indirect control by the military since then. Between 1962 and 1974, Myanmar was ruled by a revolutionary council headed by the general. Almost all aspects of society (business, media, production) were nationalised or brought under government control under the Burmese Way to Socialism, which combined Soviet-style nationalisation and central planning.

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A new constitution of the Socialist Republic of the Union of Burma was adopted in 1974. Until 1988, the country was ruled as a one-party system, with the general and other military officers resigning and ruling through the Burma Socialist Programme Party (BSPP). During this period, Myanmar became one of the world's most impoverished countries.

From Wikipedia: Myanmar · History: Military rule (1962–2011) (CC BY-SA 4.0)

Achievements and Monuments

A diverse range of indigenous cultures exists in Myanmar, with the majority culture primarily Buddhist and Bamar. Bamar culture has been influenced by the cultures of neighbouring countries, manifested in its language, cuisine, music, dance, and theatre. The arts, particularly literature, have historically been influenced by the local form of Theravada Buddhism. Considered the national epic of Myanmar, the Yama Zatdaw, an adaptation of India's Ramayana, has been influenced greatly by Thai, Mon, and Indian versions of the play. Buddhism is practised along with nat worship, which involves elaborate rituals to propitiate one from a pantheon of 37 nats.

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In a traditional village, the monastery is the centre of cultural life. Monks are venerated and supported by the lay people.

From Wikipedia: Myanmar · Culture (CC BY-SA 4.0)

Decline and Fall

Ended
1989 CE
Last recorded ruler
Myint Swe

Vichy France

1940 CE – 1944 CE · Capital: Paris · 11,922,201 km²

Second cabinet of Philippe Pétain, 1940
Second cabinet of Philippe Pétain, 1940 Unknown authorUnknown author · Public domain · Commons

Vichy France (French: Régime de Vichy, lit. 'Vichy regime'; 10 July 1940 – 9 August 1944), also known as the Pétainist regime (Régime pétainiste) and Pétainist France, officially the French State (État français), was a French rump state headed by Marshal Philippe Pétain during World War II, established as a result of German victory in the Battle of France. It was named after its seat of government, the city of Vichy. Officially independent, but with half of its territory occupied under the harsh terms of the 1940 armistice with Nazi Germany, it adopted a policy of collaboration.

From Wikipedia: Vichy France (CC BY-SA 4.0)

Origins and Founding

Founded
1940 CE

Capitals

La Tour Eiffel vue de la Tour Saint-Jacques, Paris.
La Tour Eiffel vue de la Tour Saint-Jacques, Paris. Yann Caradec from Paris, France · CC BY-SA 2.0 · Commons
Paris
Capital
Vichy
Capital

Rulers

Government, Society and Religion

For decades, the French government argued that the French Republic had been dismantled when Philippe Pétain instituted a new French State during the war and that the Republic had been reestablished when the war was over. It was not for the Republic, therefore, to apologise for events that happened while it had not existed and that had been carried out by a State it did not recognize. For example, former President François Mitterrand had maintained that the Vichy Government, not France's Republic, was responsible. This position was more recently reiterated by Marine Le Pen, leader of the National Front Party, during the 2017 election campaign.

From Wikipedia: Vichy France · Collaboration with Nazi Germany: Government responsibility (CC BY-SA 4.0)

Government
Unitary Pétainist dictatorship
Languages
French

Economy and Trade

Vichy rhetoric exalted the skilled labourer and small businessman. In practice, the needs of artisans for raw materials were neglected in favour of big businesses. The General Committee for the Organization of Commerce (CGOC) was a national program to modernise and professionalise small business. In 1941 it also instituted the mobilisation of non-ferrous metals under the cover of supporting French agriculture but in fact to support flagging German armament production.

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In 1940, the government took direct control of all production, which was synchronized with German demands. It replaced free trade unions with compulsory state unions that dictated labour policy without regard to the voice or needs of the workers.

From Wikipedia: Vichy France · Social and economic history: Economy (CC BY-SA 4.0)

Coins, Currency and Symbols

pièce de 1 Franc 1999
pièce de 1 Franc 1999 1Franc1999revers.png: Choloepus 1Franc1999avers.png: Choloepus derivative work: Luigi Chiesa (talk) · Public domain · Commons
Currency
French franc, Coins of Vichy France
  • Booth for toll collection on the road to Cirque de Troumouse. Gavarnie-Gèdre, Hautes-Pyrénées, France
    Booth for toll collection on the road to Cirque de Troumouse. Gavarnie-Gèdre, Hautes-Pyrénées, France LBM1948 · CC BY-SA 4.0 · Commons
  • 1 franc état français (Pétain) 1943
    1 franc état français (Pétain) 1943 Philippe Giabbanelli · CC BY-SA 3.0 · Commons
  • Flag of France
    Flag of France Original: Unknown Vector: SKopp · Public domain · Commons
  • Le cartouche de l'État Français
    Le cartouche de l'État Français Mliu92 · CC BY-SA 4.0 · Commons

Wars and Battles

In June 1940, the Fall of France made the French hold on Indochina tenuous. The isolated colonial administration was cut off from outside help and from outside supplies. After negotiations with Japan, the French allowed the Japanese to set up military bases in Indochina. That seemingly-subservient behaviour convinced Major-General Plaek Pibulsonggram, the prime minister of the Kingdom of Thailand, that Vichy France would not seriously resist a campaign by the Thai military to recover parts of Cambodia and Laos that had been taken from Thailand by France in the early 20th century. In October 1940, the military forces of Thailand attacked across the border with Indochina and launched the Franco-Thai War.

From Wikipedia: Vichy France · Foreign relations: French Indochina, Japan and Franco-Thai War (CC BY-SA 4.0)

Achievements and Monuments

Decline and Fall

On 10 July 1940, the Chamber of Deputies and the Senate gathered in joint session in the quiet spa town of Vichy, their provisional capital in central France. Lyon, France's second-largest city, would have been a more logical choice but Mayor Édouard Herriot was too associated with the Third Republic. Marseille had a reputation as an organized crime hub. Toulouse was too remote and had a left-wing reputation. Vichy was centrally located and had many hotels for ministers to use.

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Pierre Laval and Raphaël Alibert began their campaign to convince the assembled senators and deputies to vote full powers to Pétain. They used every means available, such as promising ministerial posts to some and threatening and intimidating others.

From Wikipedia: Vichy France · Fall of France and establishment of the Vichy government: 10 July 1940 vote of full powers (CC BY-SA 4.0)

Ended
1944 CE
Last recorded ruler
Philippe Pétain

Democratic Republic of Vietnam

1956 CE – 1975 CE · Capital: Hanoi · 186,286 km²

The Resistance Coalition Government of the Democratic Republic of Vietnam
The Resistance Coalition Government of the Democratic Republic of Vietnam Vietnam Government · Public domain · Commons

The Democratic Republic of Vietnam (DRV; Vietnamese: Việt Nam Dân chủ Cộng hòa – VNDCCH) was a country in Southeast Asia from 1945 to 1976, with sovereignty recognized in July 1954, after which it became commonly known as North Vietnam. A member of the communist Eastern Bloc, it opposed the anti-communist, French-associated State of Vietnam and later its successor state the Western-allied Republic of Vietnam (South Vietnam).

From Wikipedia: North Vietnam (CC BY-SA 4.0)

Origins and Founding

Founded
1956 CE
Preceded by
French Indochina

Rulers

  • Trường Chinh
  • Hồ Chí Minh

Government, Society and Religion

North Vietnam established a system of autonomous regions (Vietnamese: Khu tự trị) similar to (and based on) the autonomous regions of China. In recognising the traditional separatism of tribal minorities, this policy of accommodationism gave them self-government in exchange for acceptance of Hanoi's control. These regions existed from 1955 but following the merger of the Democratic Republic of Vietnam and the Republic of South Vietnam the system of autonomous regions was not continued and were fully abolished by 1978.

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Việt Bắc Autonomous Region (Khu tự trị Việt Bắc), established in 1956.

Lào-Hà-Yên Autonomous Region (Khu tự trị Lào-Hà-Yên), established in 1957.

From Wikipedia: North Vietnam · Government and politics: Autonomous regions (CC BY-SA 4.0)

Government
Unitary communist state
Languages
Vietnamese alphabet
Religion
State atheism
Population
c. 20 million

Economy and Trade

The land reform program was a success in terms of distributing much land to poor and landless peasants and reducing or eliminating the land holdings of landlords (địa chủ) and rich peasants. By 1960, there were 40,000 cooperatives spanning nearly nine-tenths of all farmland. The program, proceeded by a Three Year Plan (1957–1960), lifted agricultural production to 5.4 million tonnes or over double pre-Indochina War levels.

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However, it was carried out with violence and repression primarily directed against large landowners identified, sometimes incorrectly, as landlords. Executions and imprisonment of persons classified as "reactionary and evil landlords" were contemplated from the beginning of the land reform program. A Politburo document dated 4 May 1953 said that the planned executions were "fixed in principle at the ratio of one per one thousand people of the total population".

From Wikipedia: North Vietnam · Economy: Results (CC BY-SA 4.0)

Coins, Currency and Symbols

North Vietnam 1 Dong 1946 aluminum, KM#3
North Vietnam 1 Dong 1946 aluminum, KM#3 This media: Art Hanoi ; Subject work: ? ; · Public domain · Commons
Currency
Vietnamese đồng
  • Illustration of corruption of 1million dong
    Illustration of corruption of 1million dong Encik Tekateki · CC0 · Commons
  • Flag of North Vietnam (1955–1976)
    Flag of North Vietnam (1955–1976) See File History below for details. · Public domain · Commons

Wars and Battles

In the wake of the Hai Phong incident and the deterioration of the Fontainebleau Agreements, the French reoccupied Hanoi and the First Indochina War (1946–54) followed, during which many urban areas fell under French control. Following the Chinese Communist Revolution (1946–50), Chinese communist forces arrived on the border in 1949. Chinese aid revived the fortunes of the Viet Minh and transformed it from a guerrilla militia into a standing army. The outbreak of the Korean War in June 1950 transformed what had been an anti-colonial struggle into a Cold War battleground, with the U.S. providing financial support to the French.

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The DRV became increasingly radicalized in 1948 as Indochinese Communist Party (ICP) leaders began looking beyond independence toward building a socialist regime.

From Wikipedia: North Vietnam · History: First Indochina War (CC BY-SA 4.0)

Kingdom of Cambodia

1956 CE – 2024 CE · Capital: Phnom Penh · 184,307 km²

Angkor Wat, Cambodia, as seen from the west entrance
Angkor Wat, Cambodia, as seen from the west entrance Manfred Werner (talk · contribs) · CC BY-SA 3.0 · Commons

Cambodia, officially the Kingdom of Cambodia, is a country in Mainland Southeast Asia. It is bordered by Thailand to the northwest, Laos to the north, and Vietnam to the east, and has a coastline along the Gulf of Thailand in the southwest. It spans an area of about 181,035 km2 (69,898 sq mi), dominated by a low-lying plain and the confluence of the Mekong river and Tonlé Sap, Southeast Asia's largest lake. It is dominated by a tropical climate. Cambodia has a population of about 17 million people, the majority of whom are ethnically Khmer.

From Wikipedia: Cambodia (CC BY-SA 4.0)

Origins and Founding

There exists evidence for a Pleistocene human occupation of what later is Cambodia, which includes quartz and quartzite pebble tools found in terraces along the Mekong River, in Stung Treng and Kratié provinces, and in Kampot province. Some archaeological evidence shows communities of hunter-gatherers inhabited the region during the Holocene: the most ancient archaeological discovery site in Cambodia is considered to be the cave of Laang Spean, 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.

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Archaeological records for the period between the Holocene and Iron Age remain equally limited.

From Wikipedia: Cambodia · History: Prehistory (CC BY-SA 4.0)

Founded
1956 CE

Rulers

Government, Society and Religion

Cambodia is a constitutional monarchy with a unitary structure and a parliamentary form of government. The king is officially the head of state and is the symbol of unity and "perpetuity" of the nation, as defined by Cambodia's constitution. Legislative powers are shared by the executive and the bicameral Parliament of Cambodia (សភាតំណាងរាស្ត្រ, sâphéa tâmnang réastrâ), which consists of a lower house, the National Assembly (រដ្ឋសភា, rôdthâsâphéa) and an upper house, the Senate (ព្រឹទ្ធសភា, prœ̆tthôsâphéa). Members of the 125-seat National Assembly are elected through a system of proportional representation and serve for a maximum term of five years. The Senate has 62 seats, two of which are appointed by the king and two others by the National Assembly, and the rest are elected by the commune councillors from the 24 provinces of Cambodia. Senators serve six-year terms.

From Wikipedia: Cambodia · Politics (CC BY-SA 4.0)

Government
Unitary parliamentary constitutional elective monarchy under a hereditary dictatorship
Languages
Khmer
Religion
Islam, Christianity, animism

Economy and Trade

Cambodia has two rail lines, totalling about 612 km (380 mi) of single, 1 m (3 ft 3 in) gauge track. The lines run from the capital to Sihanoukville on the southern coast. Trains are again running to and from the Cambodian capital and destinations in the south. After 14 years, regular rail services between the two cities restarted – offering a safer option than road for travellers. Trains run from Phnom Penh to Sisophon (trains often run only as far as Battambang). As of 1987, only one passenger train per week operated between Phnom Penh and Battambang and a US$141 million project, funded mostly by the Asian Development Bank, has been started to revitalise the languishing rail system that will "(interlink) Cambodia with major industrial and logistics centres in Bangkok and Ho Chi Minh City".

From Wikipedia: Cambodia · Economy: Transport (CC BY-SA 4.0)

Coins, Currency and Symbols

Scanned photograph of Cambodian currency (riel) circa 2000. Some notes now superseded but all still legal tender. Includes 100, 200, 500, 2000 and 5000 riel denominations.
Scanned photograph of Cambodian currency (riel) circa 2000. Some notes now superseded but all still legal tender. Includes 100, 200, 500, 2000 and 5000 riel denominations. Paxse (Paxse) · CC BY-SA 3.0 · Commons
Currency
riel
  • Flag of Cambodia
    Flag of Cambodia Unknown authorUnknown author · Public domain · Commons
  • Royal arms of Cambodia
    Royal arms of Cambodia Sodacan · Public domain · Commons

Wars and Battles

Achievements and Monuments

Rice is the staple grain, as in other Southeast Asian countries. Fish from the Mekong and Tonlé Sap rivers is a part of the diet. The supply of fish and fish products for food and trade as of 2000 was 20 kg (44 lb) per person or 2 ounces per day per person.

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French influence on Cambodian cuisine includes the Cambodian red curry with toasted baguette bread. The toasted baguette pieces are dipped in the curry and eaten. Cambodian red curry is eaten with rice and rice vermicelli noodles. A dine out dish, kuyteav, is a pork broth rice noodle soup with fried garlic, scallions, green onions that may contain toppings such as beef balls, shrimp, pork liver or lettuce. Kampot pepper accompanies crab at the Kep crab shacks and squid in the restaurants on the Ou Trojak Jet river.

Tea is grown in Mondulkiri Province and around Kirirom.

From Wikipedia: Cambodia · Culture: Cuisine (CC BY-SA 4.0)

Decline and Fall

Ended
2024 CE
Last recorded ruler
Norodom Sihamoni

Kingdom of Laos

1956 CE – 1975 CE · Capital: Vientiane (administrative), Luang Phabang (royal) · 229,137 km²

Vientiane, viewed from Patuxai Gate
Vientiane, viewed from Patuxai Gate Jakub Hałun · CC BY-SA 4.0 · Commons

The Kingdom of Laos was the former government of Laos from 1947 to 1975. Located in Southeast Asia at the heart of the Indochinese Peninsula, it was bordered by Burma and China to the northwest, North Vietnam to the east, Cambodia to the southeast, and Thailand to the west and southwest. The country was governed as a constitutional monarchy beginning with its independence on 22 October 1953.

From Wikipedia: Kingdom of Laos (CC BY-SA 4.0)

Capitals

Luang Prabang
Luang Prabang Shelly Zohar · CC BY-SA 4.0 · Commons
Vientiane
Capital
Luang Prabang
Capital

Rulers

Government, Society and Religion

Following the Franco-Lao Treaty of 1953, which gave Laos independence, the Royal Lao Government took control of the country. This treaty established a constitutional monarchy, with Sisavang Vong as King and Prince Souvanna Phouma as Prime Minister.

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Many attempts were made by the Three Princes and King Sisavang Vatthana to establish a coalition government. The First Government of National Unity was established in 1958 under Prince Souvanna Phouma, but collapsed after two months. The Prime Minister, who under the constitution appointed his ministers and received advice from the King, made a deal with his brother Prince Souphanouvong.

Souvanna Phouma gave the Communists two seats in the Cabinet, and in return Souphanouvong would integrate 1,500 of his 6,000 Communist troops into the royal army.

From Wikipedia: Kingdom of Laos · Government (CC BY-SA 4.0)

Government
Constitutional monarchy
Languages
Lao, Hmong, Khmu, French
Religion
Buddhism (official), Tai folk religion, Christianity, Other/Irreligion

Coins, Currency and Symbols

100000 Laotian kip in 2011 Obverse
100000 Laotian kip in 2011 Obverse Panxang rachavong 3000 · CC BY-SA 4.0 · Commons
Currency
Lao kip

Wars and Battles

In 1960, amidst a series of rebellions, fighting broke out between the Royal Lao Army and the Soviet Union-backed, communist Pathet Lao, a second Provisional Government of National Unity formed by Prince Souvanna Phouma in 1962 proved to be unsuccessful, and the situation steadily deteriorated thereafter as the conflict in Laos became a focus for superpower rivalry. During the North Vietnamese invasion of Laos, the Pathet Lao were backed militarily by the People's Army of Vietnam (PAVN) and Vietcong.

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Laos was also dragged into the Vietnam War after parts of Laos were invaded and occupied by North Vietnam for use as a supply route for its war against South Vietnam.

From Wikipedia: Kingdom of Laos · North Vietnamese invasion of Laos and civil war (CC BY-SA 4.0)

Decline and Fall

A ceasefire was finally attained in February 1973, following the Paris Peace Accords between the United States and North Vietnam. In April 1974, another Provisional Government of National Unity was established, with Prince Souvanna Phouma as Prime Minister. However, by this time, Pathet Lao forces controlled large areas of the country, and following the fall of Saigon and Phnom Penh to communist forces in April 1975, removed any chances of a coalition government forming in Laos. Following the communist victories in both countries, they advanced on to Vientiane.

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On 2 December 1975 in Vientiane, Prince Vong Savang submitted the letter of abdication of King Savang Vatthana to the Pathet Lao. The Lao People's Democratic Republic was established with Prince Souphanouvong as President. Kaysone Phomvihane acted as Prime Minister and Secretary-General of the Lao People's Revolutionary Party.

From Wikipedia: Kingdom of Laos · Fall of the government (CC BY-SA 4.0)

Ended
1975 CE
Last recorded ruler
Sisavang Vatthana

Republic of Vietnam

1956 CE – 1975 CE · Capital: Saigon · 180,020 km²

Saigon City Hall
Saigon City Hall goosmurf · CC BY 2.0 · Commons

The Republic of Vietnam (RVN; Vietnamese: Việt Nam Cộng hòa, VNCH), commonly known as South Vietnam, was a country in Southeast Asia that existed from 1955 to 1975. It first garnered recognition in 1949 as the associated State of Vietnam within the French Union, with its capital at Saigon. Since 1950, it was a member of the Western Bloc during the Cold War. Following the 1954 partition of Vietnam, it became known as South Vietnam and was established as a republic in 1955.

From Wikipedia: South Vietnam (CC BY-SA 4.0)

Origins and Founding

Founded
1956 CE
Preceded by
French Indochina

Rulers

Government, Society and Religion

South Vietnam, as a unitary and centralized state, went through many political changes during its existence. Domestic politics in the Republic of Vietnam underwent a turbulent wartime evolution, shifting from authoritarianism under the ideology of personalism (1955–1963) to fractious military juntas (1963–1967) and eventually to the dynamic Second Republic (1967–1975). Described by K. W. Taylor as "a relatively stable experiment in parliamentary democracy" in an introduction to the essays by South Vietnamese officials, the Second Republic was a hybrid regime that was more democratic than previous governments. Its diverse socio-political groups were characterized by "a deep yearning for peace, a sense of civic responsibility, the pursuit of intellectual and artistic freedom, and an overall critical attitude toward the government".

From Wikipedia: South Vietnam · Government, politics, and civil society (CC BY-SA 4.0)

Government
Unitary authoritarian presidential republic (1955–1963)
Languages
Vietnamese
Population
c. 12 million

Economy and Trade

South Vietnam maintained a capitalist free-market economy with ties to the West. The economy was greatly assisted by American aid and the presence of large numbers of Americans in the country between 1961 and 1973 during Vietnam War. In 1951, South Vietnam established the airline Air Vietnam. Electrical production increased fourteen-fold between 1954 and 1973 while industrial output increase by an average of 6.9 percent annually. During the same period, rice output increased by 203 percent and the number of students in university increased from 2,000 to 90,000. US aid peaked at $2.3 billion in 1973, but dropped to $1.1 billion in 1974. Inflation rose to 200 percent as the country suffered economic shock due to the decrease of American aid as well as the oil price shock of October 1973.

From Wikipedia: South Vietnam · Economy (CC BY-SA 4.0)

Coins, Currency and Symbols

A South Vietnamese 1 Dong Coin from 1964
A South Vietnamese 1 Dong Coin from 1964 Justin417 · CC BY-SA 4.0 · Commons
Currency
South Vietnamese đồng
  • Flag of South Vietnam
    Flag of South Vietnam (many, see history) · Public domain · Commons

Wars and Battles

The Diệm government lost support among the populace, and from the Kennedy administration, due to its mishandling of Buddhist activists and military defeats by the Viet Cong. Notably, the Huế Phật Đản shootings of 8 May 1963 led to the Buddhist crisis, provoking protests and civil resistance. The situation came to a head when the Special Forces were sent to raid Buddhist temples across the country, leaving a death toll estimated to be in the hundreds. Diệm was overthrown in a coup on 1 November 1963 with the tacit approval of the US.

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Diệm's removal and assassination set off a period of political instability and declining legitimacy of the Saigon government. General Dương Văn Minh became president, but he was ousted in January 1964 by General Nguyễn Khánh. Phan Khắc Sửu was named head of state, but power remained with a junta of generals led by Khánh, which soon fell to infighting.

From Wikipedia: South Vietnam · History: Military juntas (1963–1967) (CC BY-SA 4.0)

Achievements and Monuments

The educational system of the Republic of Vietnam was diverse, encompassing private and state institutions, as well as schools affiliated with ethnic communities and religious denominations. The Congress of Education in 1958 defined three main principles of education: humanism (nhân bản), nation (dân tộc), and liberalism (khai phóng).

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The intellectual culture of universities in South Vietnam, with their journals, literary societies, and cultural groups, was highly varied. Some were associated with religions such as Catholicism, Buddhism, and Hòa Hảo; some were politically radical, others more conservative, and still others rarely addressed politics at all.

From Wikipedia: South Vietnam · Culture: Education (CC BY-SA 4.0)

Decline and Fall

Morale was low in South Vietnam as the PAVN advanced. A last-ditch defense was made by the ARVN 18th Division at the Battle of Xuân Lộc from 9–21 April. Thiệu resigned on 21 April 1975, and fled to Taiwan. He nominated his Vice President Trần Văn Hương as his successor. After only one week in office, the South Vietnamese national assembly voted to hand over the presidency to General Dương Văn Minh. Minh was seen as a more conciliatory figure toward the North, and it was hoped he might be able to negotiate a more favourable settlement to end the war. The North, however, was not interested in negotiations, and its forces captured Saigon. Minh unconditionally surrendered Saigon and the rest of South Vietnam to North Vietnam on 30 April 1975.

From Wikipedia: South Vietnam · History: Fall of Saigon: April 1975 (CC BY-SA 4.0)

Ended
1975 CE
Last recorded ruler
Duong Van Minh

Communist Laos

1976 CE – 2024 CE · Capital: Vientiane · 229,246 km²

Karst peaks and green paddy fields under a stormy sky, South view from the top of Mount Nam Xay, during the monsoon, in Vang Vieng, Vientiane Province, Laos.
Karst peaks and green paddy fields under a stormy sky, South view from the top of Mount Nam Xay, during the monsoon, in Vang Vieng, Vientiane Province, Laos. Basile Morin · CC BY-SA 4.0 · Commons

Laos, officially the Lao People's Democratic Republic (LPDR), is a country in Mainland Southeast Asia; it is the only landlocked country in Southeast Asia. It is bordered by Myanmar and China to the northwest, Vietnam to the east, Cambodia to the southeast, and Thailand to the west and southwest. Laos has a population of more than 8 million, and its capital and most populous city is Vientiane. It has three UNESCO World Heritage Sites: the town of Luang Prabang, the temple complex of Vat Phou, and the Plain of Jars.

From Wikipedia: Laos (CC BY-SA 4.0)

Origins and Founding

In 2009, an anatomically modern human skull was recovered from Tam Pa Ling Cave in the Annamite Mountains. At least 46,000 years old, the skull was the oldest modern human fossil discovered in Southeast Asia at the time. Stone artifacts, including Hoabinhian types, have also been found at Pleistocene sites in northern Laos.

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Archaeological evidence indicates that an agricultural society developed during the 4th millennium BCE, with bronze artifacts appearing around 1500 BCE and iron tools by 700 BCE. The proto-historic period was characterized by contact with Chinese and Indian civilizations. Linguistic and historical evidence indicates that Tai-speaking groups migrated southwest from Guangxi into present-day Laos and Thailand between the 8th and 10th centuries.

From Wikipedia: Laos · History: Prehistory (CC BY-SA 4.0)

Founded
1976 CE

Rulers

Government, Society and Religion

The National Assembly of Laos is the supreme state organ of power and formally holds the unified powers of the state. It is the only state organ that can adopt or amend the communist state constitution, which was adopted on 14 August 1991. The National Assembly is officially considered the embodiment of popular sovereignty since it is elected through elections in which candidates are vetted by the National Election Committee. The LPRP, state organs, the Lao Front for National Development, the largest transmission-belt mass organization in the country, and other transmission-belt mass organizations are allowed to nominate candidates to the National Election Committee, which can either approve or reject them.

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The National Assembly is not a permanent organ, and in between its sessions it is led by its permanent organ, the Standing Committee.

From Wikipedia: Laos · Politics: National Assembly (CC BY-SA 4.0)

Government
Communist state
Languages
Lao, Khmu, Hmong, Phu Thai, Tai

Economy and Trade

Pakse has experienced growth based on cross-border trade with Thailand and Vietnam. In 2009, the Obama administration in the US declared Laos was no longer a communist state and lifted bans on Lao companies receiving financing from the US Export-Import Bank. In 2016, China was the biggest foreign investor in the Lao economy, having invested US$5.395 billion since 1989, according to the Laos Ministry of Planning and Investment's 1989–2014 report. Thailand (invested US$4.489 billion) and Vietnam (invested US$3.108 billion) are the second and third largest investors respectively.

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Subsistence agriculture accounts for half of the GDP and provides 80% of employment. 4% of the country is arable land, and 0.3% is used as permanent crop land, the lowest percentage in the Greater Mekong Subregion.

From Wikipedia: Laos · Economy (CC BY-SA 4.0)

Coins, Currency and Symbols

100000 Laotian kip in 2011 Obverse
100000 Laotian kip in 2011 Obverse Panxang rachavong 3000 · CC BY-SA 4.0 · Commons
Currency
Lao kip
  • Flag of Laos
    Flag of Laos SKopp · Public domain · Commons
  • Emblem of Laos (1991-2025)
    Emblem of Laos (1991-2025) DTR · Public domain · Commons

Wars and Battles

Achievements and Monuments

The first feature-length film made after the monarchy was abolished is Gun Voice from the Plain of Jars directed by Somchith Pholsena in 1983, and its release was prevented by a censorship board. A commercial feature-length film was Sabaidee Luang Prabang, made in 2008. The 2017 documentary feature film Blood Road was predominantly shot and produced in Laos with assistance from the government. It was recognised with a News and Documentary Emmy Award in 2018.

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Australian filmmaker Kim Mordount's first feature film was made in Laos and features a Laotian cast speaking their native language. Entitled The Rocket, the film appeared at the 2013 Melbourne International Film Festival and won three awards at the Berlin International Film Festival.

From Wikipedia: Laos · Culture: Cinema (CC BY-SA 4.0)

Decline and Fall

Ended
2024 CE
Last recorded ruler
Thongloun Sisoulith

Khmer Rouge

1976 CE – 1978 CE · 184,307 km²

Khmer Rouge is the name that was popularly given to members of the Communist Party of Kampuchea (CPK), and by extension to Democratic Kampuchea, which ruled Cambodia between 1975 and 1979. The name was coined in the 1960s by Norodom Sihanouk to describe his country's heterogeneous, communist-led dissidents, with whom he allied after the 1970 Cambodian coup d'état. The Kampuchea Revolutionary Army was slowly built up in the forests of eastern Cambodia during the late 1960s, supported by the People's Army of Vietnam, the Viet Cong, the Pathet Lao, and the Chinese Communist Party (CCP).

From Wikipedia: Khmer Rouge (CC BY-SA 4.0)

Origins and Founding

The history of the communist movement in Cambodia can be divided into six phases, namely the emergence before World War II of the Indochinese Communist Party (ICP), whose members were almost exclusively Vietnamese; the 10-year struggle for independence from the French, when a separate Cambodian communist party, the Kampuchean People's Revolutionary Party (KPRP), was established under Vietnamese auspices; the period following the Second Party Congress of the KPRP in 1960, when Saloth Sar gained control of its apparatus; the revolutionary struggle from the initiation of the Khmer Rouge insurgency in 1967–1968 to the fall of the Lon Nol government in April 1975; the Democratic Kampuchea regime from April 1975 to January 1979; and the period following the Third Party Congress of the KPRP in January 1979, when Hanoi effectively assumed control over Cambodia's government and communist party.

From Wikipedia: Khmer Rouge · History: Early history (CC BY-SA 4.0)

Founder
Son Ngoc Minh
Founded
1976 CE

Rulers

  • Pol Pot

Government, Society and Religion

Democratic Kampuchea was an atheist state, although its constitution stated that everyone had freedom of religion, or freedom not to practice a religion. However, it specified that what it termed "reactionary religion" would not be permitted. While in practice religious activity was not tolerated, the relationship of the CPK to the majority Cambodian Theravada Buddhism was complex; several key figures in its history, such as Tou Samouth and Ta Mok, were former monks, along with many lower level cadres, who often proved to be some of the strictest disciplinarians. While there was extreme harassment of Buddhist institutions, the CPK regime had a tendency to internalise and reconfigure the symbolism and language of Cambodian Buddhism so that many revolutionary slogans mimicked the formulae which were learned by young monks during their training.

From Wikipedia: Khmer Rouge · Ideology: Relationship to religion (CC BY-SA 4.0)

Economy and Trade

The goal of Khmer Rouge was to create a communist society through the complete and immediate abolition of money, trade and private property. The new society was to be perfectly egalitarian, which required homogeneity, which Khmer Rouge sought to achieve through the destruction of existing social structures and the uniformisation of the newly emerging socialist society. To this end, the creation of a "new society" that would completely break with the existing traditions and cultural heritage of Cambodia was also considered necessary. One of the Khmer Rouge activists stated: "We must burn the old grass so that new grass can grow."

From Wikipedia: Khmer Rouge · Ideology: Economy (CC BY-SA 4.0)

Coins, Currency and Symbols

  • Flag of Democratic Kampuchea
    Flag of Democratic Kampuchea This (SVG on base of source) was created by me. See File History, below, for details. · Public domain · Commons

Wars and Battles

Fearing that Vietnam would attack Cambodia, Pol Pot ordered a pre-emptive invasion of Vietnam on 18 April 1978. His Khmer Rouge forces crossed the border and looted nearby villages, mostly in the border town of Ba Chúc. Of the 3,157 civilians who had lived in Ba Chúc, only two survived the massacre. These Khmer Rouge forces were repelled by the Vietnamese.

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After several years of border conflict and after a flood of refugees fled from Kampuchea, relations between Kampuchea and Vietnam collapsed by December 1978. On 25 December 1978, the Vietnamese armed forces along with the Kampuchean United Front for National Salvation, an organization founded by Heng Samrin that included many dissatisfied former Khmer Rouge members, invaded Cambodia and captured Phnom Penh on 7 January 1979.

From Wikipedia: Khmer Rouge · History: War with Vietnam (CC BY-SA 4.0)

Achievements and Monuments

It is often concluded that the Khmer Rouge regime promoted functional illiteracy. This statement is not completely incorrect, but it is quite inaccurate. The Khmer Rouge wanted to "eliminate all traces of Cambodia's imperialist past", and its previous culture was one of them. The Khmer Rouge did not want the Cambodian people to be completely ignorant, and primary education was provided to them. Nevertheless, the Khmer Rouge's policies dramatically reduced the Cambodian population's cultural inflow as well as its knowledge and creativity. The Khmer Rouge's goal was to gain full control of all of the information that the Cambodian people received and spread revolutionary culture among the masses.

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Education came to a "virtual standstill" in Democratic Kampuchea.

From Wikipedia: Khmer Rouge · History: Education (CC BY-SA 4.0)

Legacy in the Modern World

The movement's ideology was shaped by a power struggle during 1976 in which the so-called Party Centre, which was led by Pol Pot, the general secretary of the Communist Party of Kampuchea, defeated other regional elements of its leadership. The Party Centre's ideology combined elements of communism with a strongly xenophobic form of Khmer nationalism. Partly because of its secrecy and partly because of changes in how it presented itself, academic interpretations of its political position vary widely, ranging from interpreting it as the "purest" Marxist–Leninist movement to characterising it as an anti-Marxist "peasant revolution". The first interpretation has been criticized by historian Ben Kiernan, who asserts that it comes from a "convenient anti-communist perspective".

From Wikipedia: Khmer Rouge · Ideology: Influence of Communist thought (CC BY-SA 4.0)

People's Republic of Kampuchea

1979 CE – 1995 CE · Capital: Phnom Penh · 184,307 km²

Phnom Penh aerial view
Phnom Penh aerial view KY Geologist · CC BY 2.0 · Commons

The People's Republic of Kampuchea (PRK) was a partially recognised state in Southeast Asia which existed from 1979 to 1992. It was a satellite state of Vietnam, founded in Cambodia by the Vietnamese-backed Kampuchean United Front for National Salvation, a group of Cambodian communists who were dissatisfied with the Khmer Rouge due to its oppressive rule and defected from it after the overthrow of Democratic Kampuchea, Pol Pot's government. Brought about by an invasion from Vietnam, which routed the Khmer Rouge armies, it had Vietnam and the Soviet Union as its main allies.

From Wikipedia: People's Republic of Kampuchea (CC BY-SA 4.0)

Origins and Founding

Initially, communist North Vietnam was a strong ally of the Khmer Rouge while it was fighting against Lon Nol's Khmer Republic during the 1970–1975 civil war. Only after the Khmer Rouge took power did the Vietnamese opinion of Kampuchea become negative, when on 1 May 1975 (the day after Saigon fell), Khmer Rouge soldiers raided the islands of Phu Quoc and Tho Chau, killing more than five hundred Vietnamese civilians; following the attack, the islands were swiftly recaptured by Vietnam. Even then, the first reactions of the Vietnamese were ambiguous, and it took Vietnam a long time to react with force, for the first impulse was to arrange matters diplomatically "within the family sphere".

From Wikipedia: People's Republic of Kampuchea · Historical background: Khmer Rouge directs its hostility against Vietnam (CC BY-SA 4.0)

Founded
1979 CE

Rulers

Government, Society and Religion

The regular armed forces of the People's Republic of Kampuchea were the Kampuchean People's Revolutionary Armed Forces (KPRAF). These were needed to project internationally the image of the new pro-Hanoi administration in Phnom Penh as a legitimate sovereign state. Raising such an indigenous force was not too difficult for the Vietnamese occupiers at the time, because the Vietnamese already had experience training and co-ordinating the army in neighbouring Laos.

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The KPRAF was formed initially from militias, former Khmer Rouge members, and conscripts. KPRAF troops were trained and supplied by the Vietnamese armed forces.

From Wikipedia: People's Republic of Kampuchea · Government structure: Military (CC BY-SA 4.0)

Government
Communist state (until 1991), Parliamentary republic (from 1991)
Languages
Khmer
Religion
State secularism

Coins, Currency and Symbols

North Vietnam 1 Dong 1946 aluminum, KM#3
North Vietnam 1 Dong 1946 aluminum, KM#3 This media: Art Hanoi ; Subject work: ? ; · Public domain · Commons
Currency
Vietnamese đồng, riel
  • Scanned photograph of Cambodian currency (riel) circa 2000. Some notes now superseded but all still legal tender. Includes 100, 200, 500, 2000 and 5000 riel denominations.
    Scanned photograph of Cambodian currency (riel) circa 2000. Some notes now superseded but all still legal tender. Includes 100, 200, 500, 2000 and 5000 riel denominations. Paxse (Paxse) · CC BY-SA 3.0 · Commons
  • Illustration of corruption of 1million dong
    Illustration of corruption of 1million dong Encik Tekateki · CC0 · Commons
  • Flag of the People's Republic of Kampuchea
    Flag of the People's Republic of Kampuchea See File History, below, for details. · Public domain · Commons

Wars and Battles

This protracted civil war would bleed Cambodia's energies throughout the 1980s. Vietnam's occupation army of as many as 200,000 troops controlled the major population centres and most of the countryside from 1979 to September 1989, but Heng Samrin's 30,000 KPRAF troops were plagued by poor morale and widespread desertion owing to low pay and poverty. Men were directly needed in their family farms as they were being rebuilt and there was much work to do.

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The civil war followed a wet season/dry season rhythm after 1980. The heavily armed Vietnamese forces conducted offensive operations during the dry seasons, and the Chinese-backed insurgency held the initiative during the rainy seasons. In 1982, Vietnam launched a major offensive against the main Khmer Rouge base at Phnom Malai in the Cardamom Mountains. But this operation met with little success.

From Wikipedia: People's Republic of Kampuchea · History: Civil war (CC BY-SA 4.0)

Achievements and Monuments

One of the main official acts of the PRK was a partial restoration of Buddhism as the state religion of Cambodia and temples were gradually reopened to accommodate the monks and to resume a certain measure of traditional religious life. In September 1979 seven old monks were officially reordained at Wat Unnalom in Phnom Penh, and these monks gradually reestablished the Cambodian sangha between 1979 and 1981. They began rebuilding the community of monks in Phnom Penh and later in the provinces, reordaining prestigious monks who had been formerly senior monks. They were not allowed, however, to ordain young novices. Repair works were started in about 700 Buddhist temples and monasteries, of the roughly 3,600 that had been destroyed or badly damaged by the Khmer Rouge. By mid-1980 traditional Buddhist festivals began to be celebrated.

From Wikipedia: People's Republic of Kampuchea · History: Restoration of cultural and religious life (CC BY-SA 4.0)

Decline and Fall

Ended
1995 CE
Last recorded ruler
Heng Samrin

Modern States of Mainland Southeast Asia: Frequently Asked Questions

Which states existed in Mainland Southeast Asia in this period?

This page maps 9 states of Mainland Southeast Asia founded between 1820 CE and 1979 CE: Burma, Vichy France, Democratic Republic of Vietnam, Kingdom of Cambodia, Kingdom of Laos, Republic of Vietnam, Communist Laos, Khmer Rouge, People's Republic of Kampuchea.

Which was the largest of the Modern States of Mainland Southeast Asia?

Vichy France had the largest mapped extent, about 11,922,201 km².

Which of the Modern States of Mainland Southeast Asia lasted longest?

Burma lasted longest, 1820 CE – 1989 CE.

Sources

  • Reading text: Wikipedia articles on the group and each state, condensed (CC BY-SA 4.0).
  • Facts, rulers and wars: Wikidata (CC0).
  • Borders: Cliopatria, Seshat Global History Databank (CC BY 4.0).
  • Pictures: Wikimedia Commons; the author and licence are under each picture.

Largest state by mapped extent: Vichy France.