Laos–Vietnam Border
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The Laos–Vietnam border is the international border between the territory of
Laos Laos, officially the Lao People's Democratic Republic (LPDR), 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 ...
and
Vietnam Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...
. The border is 2,161 km (1,343 mi) in length and runs from the
tripoint A triple border, tripoint, trijunction, triple point, or tri-border area is a geography, geographical point at which the boundaries of three countries or Administrative division, subnational entities meet. There are 175 international tripoints ...
with
China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...
in the north to tripoint with
Cambodia Cambodia, officially the Kingdom of Cambodia, is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. It is bordered by Thailand to the northwest, Laos to the north, and Vietnam to the east, and has a coastline ...
in the south.


Description

The border starts in the north at the tripoint with China and proceeds overland in a south-eastwards direction. It then turns to the west, briefly utilising the
Nam Sam River Chu River (name in Vietnam, ), also known as the Nam Sam River or Nam Xam River (name in Laos), is the largest tributary of Mã River. It originates from Houa peak at 2062m near Xam Neua town, Houaphanh Province in eastern Laos and travels east ...
, before turning sharply south-eastwards and following the
Annamite Mountains The Annamite Range (; ) is a major mountain range of Mainland Southeast Asia, extending approximately through Laos, Vietnam, and a small area in northeast Cambodia. Geography The highest points of the Annamite Range are the -high Phou Bia, th ...
and, for a period, the Sepon River, terminating at the Cambodian tripoint.


History

Historically the
Annamite Range The Annamite Range (; ) is a major mountain range of Mainland Southeast Asia, extending approximately through Laos, Vietnam, and a small area in northeast Cambodia. Geography The highest points of the Annamite Range are the -high Phou Bia, th ...
formed a natural boundary between Vietnamese kingdoms in the east and Lao, Thai and Khmer kingdoms in the west. From the 1860s
France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
began establishing a presence in the region such as
French Cochinchina French Cochinchina (sometimes spelled ''Cochin-China''; ; , chữ Hán: ) was a colony of French Indochina from 1862 to 1949, encompassing what is now Southern Vietnam. The French operated a plantation economy whose primary strategic product wa ...
and the
Kingdom of Cambodia Cambodia, officially the Kingdom of Cambodia, is a country in Southeast Asia on the Indochinese Peninsula. 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 Thail ...
, modern-day Cambodia and Vietnam, and the colony of
French Indochina French Indochina (previously spelled as French Indo-China), officially known as the Indochinese Union and after 1941 as the Indochinese Federation, was a group of French dependent territories in Southeast Asia from 1887 to 1954. It was initial ...
was created in 1887. Laos was at this point part of the Kingdom of Siam (the old name for Thailand), however it was annexed to French Indochina in 1893 following the
Franco-Siamese crisis The Franco-Siamese crisis of 1893, known in Thailand as the Incident of Rattanakosin Era 112 (, , ) was a conflict between the French Third Republic and the Kingdom of Siam. Auguste Pavie, French vice-consul in Luang Prabang in 1886, was the c ...
. The precise date of the delimitation of the frontier is unclear; the International Boundary Study states that ''"The juridical basis of the Laos–Viet-Nam boundary probably stems from ancient treaties and custom as modified or made more specific by decrees of the Indochinese administration."'' Part of the border was demarcated in 1916 following a dispute, and French maps were drawn up during the colonial period that were used as the basis for the later international border. Laos obtained a partial independence from France in 1949, with Cambodia gaining complete independence in 1953, followed by Vietnam in 1954. Vietnam was however partitioned into
North North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating Direction (geometry), direction or geography. Etymology T ...
and
South Vietnam South Vietnam, officially the Republic of Vietnam (RVN; , VNCH), was a country in Southeast Asia that existed from 1955 to 1975. It first garnered Diplomatic recognition, international recognition in 1949 as the State of Vietnam within the ...
separated by a
Vietnamese Demilitarized Zone The Vietnamese Demilitarized Zone was a demilitarized zone at the 17th parallel north, 17th parallel in Quang Tri province that was the dividing line between North Vietnam and South Vietnam from 21 July 1954 to 2 July 1976, when Vietnam was off ...
, with Laos bordering both entities. During the
Vietnam War The Vietnam War (1 November 1955 – 30 April 1975) was an armed conflict in Vietnam, Laos, and Cambodia fought between North Vietnam (Democratic Republic of Vietnam) and South Vietnam (Republic of Vietnam) and their allies. North Vietnam w ...
the border was crossed by
Ho Chi Minh (born ; 19 May 1890 – 2 September 1969), colloquially known as Uncle Ho () among other aliases and sobriquets, was a Vietnamese revolutionary and politician who served as the founder and first President of Vietnam, president of the ...
's
Viet Cong The Viet Cong (VC) was an epithet and umbrella term to refer to the communist-driven armed movement and united front organization in South Vietnam. It was formally organized as and led by the National Liberation Front of South Vietnam, and ...
supply lines along with the
communist movements The history of communism encompasses a wide variety of Ideology, ideologies and political movements sharing the core principles of common ownership of wealth, economy, economic enterprise, and property. Most modern forms of communism are ground ...
such as
Pathet Lao The Pathet Lao (), officially the Lao People's Liberation Army, was a communist political movement and political organization, organization in Laos, formed in the mid-20th century. The group ultimately gained control over the entire country of ...
led by
Souphanouvong Prince Souphanouvong (13 July 1909 – 9 January 1995; ), nicknamed the Red Prince, was along with his half-brother Prince Souvanna Phouma and Prince Boun Oum of Champasak (town), Champasak, one of the "Three Princes of the Kingdom of Laos, Three ...
and
Kaysone Phomvihane Kaysone Phomvihane (''Kraisorn Brahmavihara;'' , ; 13 December 1920 – 21 November 1992) was the first General Secretary of the Lao People's Revolutionary Party, leader of the Communist Lao People's Revolutionary Party from 1955 until his de ...
, the
Khmer Rouge The 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 Sihano ...
led by Angkar ("Organization") and Saloth Sâr ("Pol Pot"), most notably the
Ho Chi Minh Trail The Ho Chi Minh Trail (), also called Annamite Range Trail () was a Military logistics, logistical network of roads and trails that ran from North Vietnam to South Vietnam through the kingdoms of Kingdom of Laos, Laos and Cambodia (1953–1970), ...
, causing it to be heavily bombed by American forces. Following the victory of the Communists in 1975 in Vietnam, Cambodia and Laos, a border treaty was signed in 1976 based on the colonial-era border line, which was formed as "Communist Indochina" or "Indochinese Federation" after the fall of
Phnom Penh Phnom Penh is the Capital city, capital and List of cities and towns in Cambodia, most populous city of Cambodia. It has been the national capital since 1865 and has grown to become the nation's primate city and its political, economic, industr ...
,
Saigon Ho Chi Minh City (HCMC) ('','' TP.HCM; ), commonly known as Saigon (; ), is the most populous city in Vietnam with a population of around 14 million in 2025. The city's geography is defined by rivers and canals, of which the largest is Saigo ...
and
Vientiane Vientiane (, ) is the capital city, capital and largest city of Laos. Situated on the banks of the Mekong, Mekong River at the Thailand, Thai border, it comprises the five urban districts of Vientiane Prefecture and had a population of 840,000 ...
as the war had ended, with a new communist government organizations coming to power such as the
Communist Party of Vietnam The Communist Party of Vietnam (CPV) is the founding and sole legal party of the Socialist Republic of Vietnam. Founded in 1930 by Hồ Chí Minh, the CPV became the ruling party of North Vietnam in 1954 and then all of Vietnam after the col ...
(CPV), the
Communist Party of Kampuchea The Communist Party of Kampuchea (CPK), also known as the Khmer Communist Party,
Country Data. .
was a
(CPK) and
Lao People's Revolutionary Party The Lao People's Revolutionary Party (LPRP) is the founding and One-party state, sole ruling party of the Laos, Lao People's Democratic Republic. The party's monopoly on state power is guaranteed by Article 3 of the Constitution of Laos, and it ...
(LPRP) as a new system for the new society as a whole, which then formed with the constitutions as it was renamed the
Socialist Republic of Vietnam Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...
,
Democratic Kampuchea Democratic Kampuchea was the official name of the Cambodian state from 1976 to 1979, under the government of Pol Pot and the Communist Party of Kampuchea (CPK), commonly known as the Khmer Rouge. The Khmer Rouge's capture of the capital Phno ...
and
Lao People's Democratic Republic Laos, officially the Lao People's Democratic Republic (LPDR), 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 an ...
both declared by the party. On the ground demarcation then took place from 1979 to 1984. Some small modification of the border were made in 1986.


Border crossings

There are several border crossings: * Sop Hun (
May May is the fifth month of the year in the Julian and Gregorian calendars. Its length is 31 days. May is a month of spring in the Northern Hemisphere, and autumn in the Southern Hemisphere. Therefore, May in the Southern Hemisphere is the ...
, Phongsaly, Laos) – Tây Trang ( Điện Biên district, Điện Biên province, Vietnam) * Namsoi ( Viengxay, Houaphanh, Laos) – Na Mèo ( Quan Sơn,
Thanh Hóa Thanh Hóa () is the capital of Thanh Hóa Province. The city is situated in the east of the province on the Ma River (Sông Mã), about 150 kilometers (93 miles) south of capital Hanoi and 1560 kilometers (969 miles) north of Ho Chi Minh Cit ...
, Vietnam) * Namkan (
Nong Het Nong Het, also Nong Haet, Nonghet, Muang Nonghet or Nonghed, is a market town in Xiangkhouang Province in northeastern Laos, located about from the border with Vietnam. It is the principal town of Nong Het District. It is located along Route 7, ...
,
Xiangkhouang Xiangkhouang ( Lao: ຊຽງຂວາງ, meaning 'Horizontal City') is a province of Laos on the Xiangkhoang Plateau, in the nation's northeast. The province has the distinction of being the most heavily-bombed place on Earth. Historically, ...
, Laos) – Nậm Cắn ( Kỳ Sơn, Nghệ An, Vietnam) * Namphao ( Khamkeut, Bolikhamsai, Laos) – Cầu Treo ( Hương Sơn,
Hà Tĩnh Hà Tĩnh () is a city in Vietnam.Atlas of the World', Oxford University Press, 2011, p. 236. It is the capital of Hà Tĩnh Province, and lies in the North Central Coast region. It is located on National Highway 1A. The Vietnamese capital Han ...
, Vietnam) * Naphao ( Boualapha, Khammouane, Laos) – Cha Lo ( Minh Hóa, Quảng Bình, Vietnam) * Dansavan ( Seponh,
Savannakhet Savannakhet (, ; ), officially named Kaysone Phomvihane (); since 2005 and previously known as ''Khanthaboury'' (; ), is a city in western Laos. It is the capital of Savannakhet Province. With a population of 125,760 (2018), it is the second-l ...
, Laos) – Lao Bảo ( Hướng Hóa,
Quảng Trị Quảng Trị () is a district-level town in Quảng Trị Province in the North Central Coast region of Vietnam. It is second of two municipalities in the province after the provincial capital Đông Hà. History The Sino-Vietnamese name Qu ...
, Vietnam) * Phoukeua ( Phouvong,
Attapeu Attapeu (, ), also written as Attopu or Attapu, is a town in southern Laos, serving as the capital of Attapeu province. Its official name is Muang Samakhi Xay. It is the southernmost of provincial capitals in Laos. Most of the inhabitants are La ...
, Laos) – Bờ Y ( Ngọc Hồi,
Kon Tum Kon Tum is the capital city of Kon Tum Province in Vietnam. It is located inland in the Central Highlands region of Vietnam, near the borders of Laos and Cambodia. Historically, this area has been inhabited by the indigenous Ba Na people, whic ...
, Vietnam)


See also

*
Laos–Vietnam relations Laos–Vietnam relations () ( Laotian: ການພົວພັນ ລາວ-ຫວຽດນາມ) are the traditional friendship, special solidarity and comprehensive cooperation from history to the present between the Lao People's Democratic Re ...


References

{{DEFAULTSORT:Laos-Vietnam border
border Borders are generally defined as geography, geographical boundaries, imposed either by features such as oceans and terrain, or by polity, political entities such as governments, sovereign states, federated states, and other administrative divisio ...
Borders of Vietnam Borders of Laos International borders