List of border conflicts - AbsoluteAstronomy.com

The following is a list of border conflicts between two or more countries. The list includes only those fought because of border disputes.

19th Century

Start	Finish	Conflict	Combatants	Fatalities
1846	1848	Mexican–American War Mexican–American War The Mexican–American War, also known as the First American Intervention, the Mexican War, or the U.S.–Mexican War, was an armed conflict between the United States and Mexico from 1846 to 1848 in the wake of the 1845 U.S...	United States - Mexico	~29,000
1859	1859	Pig War Pig War The Pig War was a confrontation in 1859 between the United States and the British Empire over the boundary between the US and British North America. The territory in dispute was the San Juan Islands, which lie between Vancouver Island and the North American mainland...	United States - United Kingdom	1 pig (no human casualties)

20th Century before World War II

Start	Finish	Conflict	Combatants	Fatalities
1910	1918	Border War	United States - Mexico	100+
1932	1935	Chaco War Chaco War The Chaco War was fought between Bolivia and Paraguay over control of the northern part of the Gran Chaco region of South America, which was incorrectly thought to be rich in oil. It is also referred to as La Guerra de la Sed in literary circles for being fought in the semi-arid Chaco...	Bolivia - Paraguay	~100,000
1938	1938	Battle of Lake Khasan Battle of Lake Khasan The Battle of Lake Khasan and also known as the Changkufeng Incident in China and Japan, was an attempted military incursion of Manchukuo into the territory claimed by the Soviet Union...	Soviet Union – Japan	~1,300
1939	1939	Slovak–Hungarian War	Slovakia – Hungary Kingdom of Hungary (1920–1946) The Kingdom of Hungary also known as the Regency, existed from 1920 to 1946 and was a de facto country under Regent Miklós Horthy. Horthy officially represented the abdicated Hungarian monarchy of Charles IV, Apostolic King of Hungary...	66
1939	1939	Battle of Khalkhin Gol Battle of Khalkhin Gol The Battles of Khalkhyn Gol was the decisive engagement of the undeclared Soviet–Japanese Border Wars fought among the Soviet Union, Mongolia and the Empire of Japan in 1939. The conflict was named after the river Khalkhyn Gol, which passes through the battlefield...	Soviet Union – Japan	~16,000

1945-2000

Start	Finish	Conflict	Combatants	Fatalities
1947	1948	Indo-Pakistani War of 1947 Indo-Pakistani War of 1947 The India-Pakistan War of 1947-48, sometimes known as the First Kashmir War, was fought between India and Pakistan over the princely state of Kashmir and Jammu from 1947 to 1948. It was the first of four wars fought between the two newly independent nations...	Pakistan – India	~3,000
1950	Present (CF signed in 1953)	Korean War Korean War The Korean War was a conventional war between South Korea, supported by the United Nations, and North Korea, supported by the People's Republic of China , with military material aid from the Soviet Union...	South Korea -	2 419 010+
1962	1962	Sino-Indian War Sino-Indian War The Sino-Indian War , also known as the Sino-Indian Border Conflict , was a war between China and India that occurred in 1962. A disputed Himalayan border was the main pretext for war, but other issues played a role. There had been a series of violent border incidents after the 1959 Tibetan...	People's Republic of China – India	~4,000
1965	1965	Indo-Pakistani War of 1965 Indo-Pakistani War of 1965 The Indo-Pakistani War of 1965 was a culmination of skirmishes that took place between April 1965 and September 1965 between Pakistan and India. This conflict became known as the Second Kashmir War fought by India and Pakistan over the disputed region of Kashmir, the first having been fought in 1947...	Pakistan – India	~6,800
1966	1989	South African Border War South African Border War The South African Border War, commonly referred to as the Angolan Bush War in South Africa, was a conflict that took place from 1966 to 1989 in South-West Africa and Angola between South Africa and its allied forces on the one side and the Angolan government, South-West Africa People's...	Angola – South Africa	Unknown
1967	1967	Chola incident Chola incident The 1967 Sino-Indian skirmish also known as the Chola incident, was a day-long military conflict between Indian troops and members of the Chinese People's Liberation Army in Sikkim, who had infiltrated the area. The end of the battle saw the retreat of the People's Liberation Army from...	India – People's Republic of China	~5
1969	1969	Sino-Soviet border conflict Sino-Soviet border conflict The Sino–Soviet border conflict was a seven-month military conflict between the Soviet Union and China at the height of the Sino–Soviet split in 1969. The most serious of these border clashes occurred in March 1969 in the vicinity of Zhenbao Island on the Ussuri River, also known as Damanskii...	People's Republic of China – Soviet Union	Unknown
1971	1971	Indo-Pakistani War of 1971 Indo-Pakistani War of 1971 The Indo-Pakistani War of 1971 was a military conflict between India and Pakistan. Indian, Bangladeshi and international sources consider the beginning of the war to be Operation Chengiz Khan, Pakistan's December 3, 1971 pre-emptive strike on 11 Indian airbases...	Pakistan – India	~4,000+
1979	1990	Sino-Vietnamese conflicts 1979-1990 Sino-Vietnamese conflicts 1979-1990 The Sino-Vietnamese conflicts of 1979–1990 were a series of border clashes between China and Vietnam following the Sino-Vietnamese War in 1979....	Vietnam – Mainland China	Unclear
1980	1988	Iran–Iraq War	Iran – Iraq	1-2 million
1981	1981	Paquisha War Paquisha War The Paquisha War was a brief military clash that took place between January and February 1981 between Ecuador and Peru over the control of three watchposts. While Peru felt that the matter was already decided in the Ecuadorian-Peruvian War of 1941, Ecuador did not agree with the Rio de Janeiro...	Ecuador – Peru	~10
1982	1982	1982 Ethiopian–Somali Border War	Ethiopia – Somalia	Unknown
1984	1987	Siachen Conflict Siachen conflict The Siachen Conflict, sometimes referred to as the Siachen War, is a military conflict between India and Pakistan over the disputed Siachen Glacier region in Kashmir. The conflict began in 1984 with India's successful Operation Meghdoot during which it wrested control of the Siachen Glacier from...	Pakistan – India	~2,400.
1985	1985	Agacher Strip War Agacher Strip War The Agacher Strip is a -long strip of land located in northeastern Burkina Faso. The area, thought to contain considerable amounts of natural gas and mineral resources, was the center of a long running border dispute between Upper Volta and Mali which erupted into armed conflict on two occasions...	Burkina Faso – Mali	179
1987	1987	1987 Sino-Indian skirmish 1987 Sino-Indian skirmish The 1987 Sino-Indian skirmish was the third military conflict between the Chinese army and Indian army that occurred at Sumdorong Chu Valley, with the previous one taking place almost a quarter of a century earlier.-Events leading up the near war:...	India – People's Republic of China	Unknown
1987	1988	Thai–Laotian Border War Thai–Laotian Border War The Thai–Laotian Border War was a short confrontation between Thai and Laotian forces. It was caused by a dispute involving the map made by French surveyors in 1907 to mark the borders between Siam and French Indochina...	Thailand Thailand Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the... – Laos Laos Laos Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ Sathalanalat Paxathipatai Paxaxon Lao, officially the Lao People's Democratic Republic, is a landlocked country in Southeast Asia, bordered by Burma and China to the northwest, Vietnam to the east, Cambodia to the south and Thailand to the west...	~1,000
1989	1991	Mauritania–Senegal Border War	Mauritania – Senegal	Unknown
1995	1995	Cenepa War Cenepa War The Cenepa War , also known as the Alto Cenepa War, was a brief and localized military conflict between Ecuador and Peru, fought over control of a disputed area on the border between the two countries...	Ecuador – Peru	~450
1998	2000	Eritrean-Ethiopian War Eritrean-Ethiopian War The Eritrean–Ethiopian War took place from May 1998 to June 2000 between Ethiopia and Eritrea, forming one of the conflicts in the Horn of Africa...	Ethiopia – Eritrea	~70,000
1999	1999	Kargil War Kargil War The Kargil War ,, also known as the Kargil conflict, was an armed conflict between India and Pakistan that took place between May and July 1999 in the Kargil district of Kashmir and elsewhere along the Line of Control...	India – Pakistan	~4,500

21st Century

Start	Finish	Conflict	Combatants	Fatalities
2000	2006	2000-2006 Shebaa Farms conflict 2000-2006 Shebaa Farms conflict The 2000–2006 Shebaa Farms conflict was a low level border conflict consisting of Hezbollah rocket and mortar attacks on the Israeli Defense Forces and IDF artillery barrages and air strikes in Southern Lebanon...	Israel – Lebanon	30
2001	2001	2001 Indian–Bangladeshi border conflict	India – Bangladesh	20
2008	2008	2008 Djiboutian–Eritrean border conflict	Djibouti – Eritrea	144
2008	Ongoing	Cambodian–Thai border dispute	Cambodia – Thailand	42
2011	Ongoing	South Kordofan conflict	Sudan –

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