List of conflicts between Armenia and Azerbaijan

The following is a list of armed conflicts between Armenia and Azerbaijan, including their modern predecessor states.

Conflict	Start	Finish	Azerbaijan (and allies)	Armenia (and allies)	Results	Notes
Armenian-Tatar War (1905-1907)	1905	1906	Caucasian Tatar groups[1]	Armenian groups ARF members Russian Empire	Russian victory	3000 to at least 10000 killed
Armenian–Azerbaijani War	1918	1920	Azerbaijan Ottoman Empire Republic of Aras (1918–1919)	Armenia Russian SFSR Azerbaijani communists Armenian communists Turkish revolutionaries (1920)	Inconclusive	Inconclusive Soviet invasion of Armenia and Azerbaijan, and subsequent victory Sovietization of Armenia and Azerbaijan Disputes over Karabakh and Nakhchivan settled in favor of Soviet Azerbaijan Most of Zangezur gained by Soviet Armenia
First Nagorno-Karabakh War	1988	1994	Azerbaijan (from 1991) Soviet Union (until 1991)[a] Azerbaijan SSR Foreign groups: Hezbe Wahdat[6] Hezb-e-Islami[7] Grey Wolves[8] Chechen volunteers[9] UNA-UNSO[10][11][12] Slavic mercenaries[13] Turkish volunteers[14][15]	Nagorno-Karabakh[b] Armenia[c] Armenian Revolutionary Federation Foreign groups: Kuban Cossacks[16] Ossetian volunteers[17] Slavic mercenaries[13]	Armenian victory[18]	Armenian victory[19] De facto independence of Nagorno-Karabakh Republic and de facto unification with Armenia[20][21][22] Armenian occupation of territories surrounding Nagorno-Karabakh
2008 Mardakert clashes	2008	2008	Azerbaijan	Artsakh	Both sides claim victory	Both sides claim victory Azerbaijan removes its troops
2010 Nagorno-Karabakh clashes	2010	2010	Azerbaijan	Armenia	Azerbaijan victory
2010 Mardakert clashes	2010	2010	Azerbaijan	Nagorno-Karabakh[23] Armenia	Inconclusive
2012 Armenian–Azerbaijani border clashes	2012	2012	Azerbaijan	Armenia Nagorno-Karabakh	Inconclusive
2014 Armenian–Azerbaijani clashes	2014	2014	Azerbaijan	Armenia Artsakh	Status quo ante bellum
April War	2016	2016	Azerbaijan	Artsakh Armenia	Inconclusive (see aftermath)	Inconclusive (see aftermath) Azerbaijan claims victory[24][25] Armenia claims to have successfully repelled the Azerbaijani offensive[26][27] The line of contact shifted for the first time since 1994[28] Azerbaijan captures a territory from 800 hectares (8.0 km2) to 2,000 hectares (20 km2), including 2 heights
Gyunnyut clashes	2018	2018	Azerbaijan	Armenia	Inconclusive See Aftermath section	Inconclusive See Aftermath section Azerbaijan gains between 10 and 15 km2 of land.[29]
July 2020 Armenian–Azerbaijani clashes	2020	2020	Azerbaijan	Armenia	Both sides claim victory[30][31]	Both sides claim victory[32][33] 2020 Azerbaijani protests No territorial changes
Second Nagorno-Karabakh War	2020	2020	Azerbaijan Turkey (alleged by Armenia)[34][35][36] Syrian mercenaries[d][40][41]	Artsakh Armenia	Azerbaijani victory[42][43]	Azerbaijani victory[44][45] Azerbaijan gains control of 72% of Republic of Artsakh territory
Armenia–Azerbaijan border crisis (2021–present)	2021	Ongoing	Azerbaijan	Armenia	Ongoing	Ongoing Azerbaijan occupies parts of the Syunik and Gegharkunik provinces adjacent to the Armenia–Azerbaijan border: 215 square kilometers (83 square miles) of Armenian territory
September 2022 Armenia–Azerbaijan clashes	2022	2022	Azerbaijan	Armenia	Ceasefire[46]	Ceasefire[47] Displacement of 7600 Armenian civilians[48] Occupation of Armenian territory Per Armenia: Azerbaijan occupied 140 km2 of Armenian territory,[49] advanced 7.5 km deep into Armenian territory towards Jermuk[50][51] Per Azerbaijan: Azerbaijan captures strategic heights along the border
2023 Azerbaijani offensive in Nagorno-Karabakh	2023	2023	Azerbaijan[e]	Artsakh[f]	Azerbaijani victory[52]	Azerbaijani victory[53] Azerbaijan regains control of Nagorno-Karabakh

See also

• Anti-Armenian sentiment in Azerbaijan
• Anti-Azerbaijani sentiment in Armenia
• Armenia–Azerbaijan relations

Notes

1. Soviet authorities generally sided with Azerbaijan over Nagorno-Karabakh.^[2] Soviet troops were present in Nagorno-Karabakh for 2+1⁄2 years and supported Azerbaijani militias.^[3] Soviet troops directly intervened during Operation Ring in April–May 1991 on the Azerbaijani side.^[4][5]
2. Nagorno-Karabakh Autonomous Oblast (NKAO) until 1991.
3. Armenian Soviet Socialist Republic (Soviet Armenia) until 1990 (renamed Republic of Armenia)/1991 (declared independence).
4. Denied by Azerbaijan^[37][38] and Turkey.^[39]
5. See § Foreign involvement for more details.
6. See § Foreign involvement for more details.