# List of border conflicts

The following is a list of border conflicts between two or more countries. The list includes only those fought because of border disputes. See list of territorial disputes for those that do not involve fighting.

## 19th century

| Start | Finish | Conflict | Combatants | Disputed Territories | Fatalities |
| 1811 | 1812 | Portuguese invasion of the Banda Oriental | Portugal v. United Provinces | Banda Oriental | Unknown |
| 1816 | 1820 | Portuguese conquest of the Banda Oriental | Portugal v. Federal League | Banda Oriental | Unknown |
| 1825 | 1828 | Cisplatine War | Empire of Brazil v. United Provinces | Banda Oriental | Unknown |
| 1837 | 1839 | Tarija War | Argentine Confederation v. Peru–Bolivian Confederation | Tarija Department | Unknown |
| 1846 | 1848 | Mexican–American War | United States v. Mexico | Texas Santa Fe de Nuevo México Alta California | ~29,000 |
| 1859 | 1859 | Pig War (1859) | United States v. United Kingdom (Colony of Vancouver Island) | San Juan Islands | None |
| 1879 | 1883 | War of the Pacific | Chile v. Bolivia and Peru | Litoral Department | ~10,000 |

## 20th century before World War II

| Start | Finish | Conflict | Combatants | Disputed Territories | Fatalities |
| 1910 | 1918 | Border War | United States v. Mexico | Mexico–United States border region | 100+ |
| 1932 | 1935 | Chaco War | Bolivia v. Paraguay | Northern Gran Chaco | ~100,000 |
| 1938 | 1938 | Battle of Lake Khasan | Soviet Union v. Japan | Manchukuo–Soviet Union border region | ~1,300 |
| 1939 | 1939 | Slovak–Hungarian War | Slovakia v. Hungary | Eastern Slovakia | 69 |
| 1939 | 1939 | Battles of Khalkhin Gol | Soviet Union and Mongolia v. Japan and Manchukuo | Manchukuo–Soviet Union border region | ~48,000 |

## 1945–2000

| Start | Finish | Conflict | Combatants | Disputed Territories | Fatalities |
| 1945 | 1945 | Levant Crisis | France v. United Kingdom | Syria-Lebanon and Transjordan | 0 |
| 1947 | 1948 | Indo-Pakistani War of 1947–1948 | India v. Pakistan | Jammu and Kashmir | ~3,000 |
| 1954 | 1954 | Annexation of Dadra and Nagar Haveli | India v. Portugal | Dadra and Nagar Haveli | 46 |
| 1956 | 1956 | Suez Crisis | Israel v. Egypt | Sinai Peninsula Suez Canal Zone | 2,848-4,198 |
| 1957 | 1958 | Ifni War | Morocco v. France and Spain | Spanish Ifni | ~1,500 |
| 1962 | 1962 | Sino-Indian War | China v. India | Aksai Chin | ~4,000 |
| 1965 | 1965 | Indo-Pakistani War of 1965 | Pakistan v. India | Kashmir | ~6,800 |
| 1969 | 1969 | Sino-Soviet border conflict | Soviet Union v. China | Zhenbao Island Ussuri River | 72-800 |
| 1971 | 1971 | Indo-Pakistani War of 1971 | Pakistan v. India | Kashmir East Pakistan | ~4,000+ |
| 1978 | 1979 | Uganda–Tanzania War | Uganda v. Tanzania | Kagera Salient | ~4,500 |
| 1979 | 1979 | Sino-Vietnamese War | China v. Vietnam | Cao Bằng Lạng Sơn Spratly Islands | ~56,000 |
| 1982 | 1982 | Falklands War | Argentina v. United Kingdom | Falkland Islands South Georgia and the South Sandwich Islands | 904 |
| 1984 | 2022 | Whisky War | Denmark v. Canada | Hans Island | 0 |
| 1984 | 1987 | Siachen conflict | Pakistan v. India | Siachen Glacier | ~2,400 |
| 1985 | 1985 | Agacher Strip War | Burkina Faso v. Mali | Agacher Strip | 140+ |
| 1987 | 1987 | Sumdorong Chu standoff | India v. China | Sumdorong Chu | Unknown |
| 1987 | 1988 | Thai–Laotian Border War | Laos and Vietnam v. Thailand | Chat Trakan district Botene district | 295 |
| 1999 | 1999 | Kargil War | India v. Pakistan | Kargil district | ~4,500 |
| 1998 | 2000 | Eritrean–Ethiopian War | Eritrea v. Ethiopia | Badme | 100,000 |

## 21st century

| Start | Finish | Conflict | Combatants | Disputed Territory | Fatalities |
| 2000 | 2006 | 2000–2006 Shebaa Farms conflict | Israel v. Lebanon | Shebaa farms | 30 |
| 2001 | 2001 | 2001 Bangladesh–India border clashes | Bangladesh v. India | Bangladesh–India border region | 20 |
| 2001 | 2002 | 2001–2002 India–Pakistan standoff | India v. Pakistan | Kashmir | 789–1,874 |
| 2002 | 2002 | Perejil Island crisis | Morocco v. Spain | Perejil Island | 0 |
| 2003 | 2005 | Conflict in Tuzla Island | Ukraine v. Russia | Tuzla Island | 0 |
| 2006 | 2006 | 2006 Lebanon War | Israel v. Lebanon | Northern District Southern Lebanon Golan Heights | 1,619-2,254 |
| 2008 | 2008 | Djiboutian–Eritrean border conflict | Djibouti v. Eritrea | Ras Doumeira | 144 |
| 2008 | 2008 | Russo-Georgian War | Georgia v. Russia | South Ossetia and Abkhazia | 247 |
| 2008 | 2012 | Cambodian–Thai border dispute | Cambodia v. Thailand | Preah Vihear Temple | 42 |
| 2008 | 2008 | 2008 Indo-Pakistani standoff | India v. Pakistan | India–Pakistan border region | Unknown |
| 2008 | 2008 | 2008 Mardakert clashes | Artsakh v. Azerbaijan | Nagorno-Karabakh (Martakert/Aghdara) | 4-20 |
| 2010 | 2010 | 2010 Nagorno-Karabakh clashes | Armenia v. Azerbaijan | Goranboy Tartar Agdam | 3-6 |
| 2010 | 2010 | 2010 Mardakert clashes | Armenia and Artsakh v. Azerbaijan | Fuzuli District Çaylı Nagorno-Karabakh (Jraberd) | 8-62 |
| 2010 | 2010 | 2010 Eritrean–Ethiopian border skirmish | Eritrea v. Ethiopia | Zalambessa | 10-35 |
| 2010 | 2010 | Costa Rica–Nicaragua San Juan River border dispute | Costa Rica v. Nicaragua | San Juan River | 0 |
| 2011 | 2011 | Battle of Wazzin | Libya v. Tunisia | Wazzin | 23 |
| 2011 | 2011 | 2011 India–Pakistan border skirmish | India v. Pakistan | Kashmir (Kupwara district and Neelum Valley) | 8 |
| 2012 | 2012 | Heglig Crisis | Sudan v. South Sudan | Unity State South Kordofan | 262–322 |
| 2012 | 2014 | Syrian–Turkish border clashes during the Syrian civil war | Syria v. Turkey | Akçakale | 17 |
| 2012 | 2012 | 2012 Armenian–Azerbaijani border clashes | Armenia and Artsakh v. Azerbaijan | Tavush Qazakh Nagorno-Karabakh | 9 |
| 2013 | 2013 | 2013 India–Pakistan border skirmishes | India v. Pakistan | Kashmir Line of Control | 28 |
| 2014 | 2014 | 2014 Armenian–Azerbaijani clashes | Armenia and Artsakh v. Azerbaijan | Armenia–Azerbaijan border region (Tavush, Qazakh) Nagorno-Karabakh Line of Contact | 19 |
| 2014 | 2015 | 2014–2015 India–Pakistan border skirmishes | India v. Pakistan | Kashmir Line of Control Indo-Pakistani border region | 58-185 |
| 2016 | 2016 | 2016 Nagorno-Karabakh conflict | Armenia and Artsakh v. Azerbaijan | Armenia–Azerbaijan border region (Tavush, Qazakh) Nagorno-Karabakh Line of Contact | 199-1,820 |
| 2016 | 2016 | Battle of Tsorona | Eritrea v. Ethiopia | Tserona subregion | 218 |
| 2016 | 2016 | 2016 Belize–Guatemala border standoff | Belize v. Guatemala | Sarstoon River | 1 |
| 2016 | 2018 | 2016–2018 India–Pakistan border skirmishes | India v. Pakistan | Kashmir | 165-232 |
| 2017 | 2017 | 2017 Afghanistan–Pakistan border skirmish | Afghanistan v. Pakistan | Chaman | 8-68 |
| 2017 | 2017 | 2017 China–India border standoff | China v. India and Bhutan | Doklam | 0 |
| 2018 | 2018 | 2018 Armenian–Azerbaijani clashes | Armenia v. Azerbaijan | Nakhchivan Autonomous Republic (Sharur District and Sadarak District) | 2–3 |
| 2019 | 2019 | 2019 India–Pakistan border skirmishes | India v. Pakistan | Line of Control | 50-62 |
| 2020 | 2020 | July 2020 Armenian–Azerbaijani clashes | Armenia v. Azerbaijan | Movses, Armenia and Ağdam, Azerbaijan | 17-141 |
| 2020 | 2021 | 2020–2022 China–India skirmishes | China v. India | Sikkim, Ladakh and Line of Actual Control | 50+ on both sides |
| 2020 | 2022 | 2020–2022 Ethiopian–Sudanese clashes | Ethiopia v. Sudan | Ethiopian–Sudanese border | 4 |
| 2021 | 2021 | 2021 Kyrgyzstan–Tajikistan conflict | Kyrgyzstan v. Tajikistan | Leilek District | 55 |
| 2022 | 2022 | September 2022 Armenia–Azerbaijan clashes | Armenia v. Azerbaijan | Armenia–Azerbaijan border | 176 |

## Ongoing

| Start | Finish | Conflict | Combatants | Disputed Territory | Fatalities |
| 2012 | Ongoing | Israeli–Syrian ceasefire line incidents during the Syrian civil war | Israel v. Syria | Quneitra Governorate Golan Heights | 44 |
| 2014 | Ongoing | Russo-Ukrainian War (outline) | Ukraine v. Russia | Crimea Donbas | 2,824-2,924+ |
| 2022 | Ongoing | 2022 Bangladesh–Myanmar border tensions | Bangladesh v. Myanmar | Bangladesh-Myanmar border region | 0 |