Armeno–Azerbaijani War

Armeno–Azerbaijani War
Conflict	Armeno–Azerbaijani War
Date	c. 1918–1920
Place	Caucasus, Karabakh, Zangezur, Nakhchivan
Result	Mixed; territorial shifts; Sovietisation
Territory	Changes in control over Nagorno-Karabakh, Karabakh, Nakhchivan, Zangezur

Armeno–Azerbaijani War was a series of armed clashes and political confrontations between First Republic of Armenia and the Azerbaijan Democratic Republic in the aftermath of the Russian Revolution of 1917 and the collapse of the Russian Empire. The conflict unfolded across the Caucasus amid competing claims over territories such as Nagorno-Karabakh, Nakhchivan, Zangezur, and surrounding districts, intersecting with the interventions of the Ottoman Empire, British Empire, and later the Russian Soviet Federative Socialist Republic. The war combined conventional engagements, irregular warfare, population transfers, and diplomatic maneuvering that shaped the region’s interwar borders.

Background

The dissolution of the Russian Empire following the February Revolution and the October Revolution left a power vacuum in the Caucasus Viceroyalty, prompting the formation of the Transcaucasian Commissariat and later the Transcaucasian Democratic Federative Republic, which soon dissolved into the First Republic of Armenia and the Azerbaijan Democratic Republic. Competing historical claims rooted in the Treaty of Turkmenchay era and administrative divisions under the Imperial Russian administration overlapped with ethnic distributions recorded in the Russian Empire Census (1897), creating disputes over districts including Shusha, Stepanakert, Goris, and Shamakhi. The entry and withdrawal of the Ottoman Third Army, the presence of the British Military Mission in Baku, and the advance of Bolshevik forces under leaders associated with the Russian Soviet Federative Socialist Republic and the Red Army further complicated territorial settlement efforts such as the proposals advanced by the Paris Peace Conference (1919–1920) and later by commissions like the Caucasian Boundary Commission.

Belligerents and Forces

Principal combatants were the First Republic of Armenia and the Azerbaijan Democratic Republic, each fielding regular units formed from veterans of the Imperial Russian Army as well as local militia drawn from Armenian Revolutionary Federation-aligned detachments and Musavat-linked volunteer bands. Armenian forces included elements organized under figures linked to Armenian National Congress structures and commanders who had fought in the Battle of Sardarapat and Battle of Bash Abaran, while Azerbaijani units combined volunteers from Baku Commune opposition, local tribal levies, and veterans associated with the Caucasian Islamic Army. External actors supplied materiel, advisers, or troops at different stages: the Ottoman Empire's remnants, the British Empire in Baku, and Bolshevik units tied to the Russian Communist Party (Bolsheviks). Irregular forces included Armenian self-defense groups active in Zangezur and Azerbaijani irregulars active in Nakhchivan and Shusha.

Course of the War

Clashes began in 1918–1919 as local skirmishes around Karabakh and Nakhchivan escalated into broader offensives and counteroffensives involving towns such as Shusha, Ganja, and Kapan. Periodic sieges, like those around Shusha and Khankendi (Stepanakert), alternated with trench warfare influenced by lessons from the First World War and mountain warfare traditions of the Caucasus Campaign. Diplomatic pauses mediated by the Allied Powers led to commissions that temporarily froze frontlines, but renewed fighting erupted with campaigns in Zangezur and incursions into the Kura-Aras lowlands. The Battle of Goris-era encounters and clashes near Karvachar saw shifting control, while episodes such as the wider turmoil in Baku and the March Days (1918) context influenced mobilization and reprisals. By 1920 the advance of the Red Army and the establishment of Soviet Socialist Republics transformed the operational environment, leading to armistices, capitulations, and the eventual sovietisation of both republics.

Casualties and Humanitarian Impact

The conflict caused substantial civilian displacement, with populations from Armenian-majority towns and Azerbaijani-majority villages uprooted during offensives and counteroffensives; reports from the era document mass flight toward Yerevan, Ganja, Aghdam, and surrounding rural centers. Casualty figures, fragmented across contemporary accounts from the Armenian Revolutionary Federation, the Musavat Party, and international observers attached to the League of Nations-era reporting structures, include thousands killed in combat and in communal violence, and tens of thousands displaced by sieges, expulsions, and famine conditions exacerbated by wartime disruption of transportation corridors such as the Baku–Tbilisi railway and supply lines through Gumri and Kars. Epidemics and shortages affected both civilian and military populations amid harsh winter campaigns in the Caucasus Mountains.

International Involvement and Diplomacy

Diplomacy involved the British Military Mission in Transcaucasia, delegations to the Paris Peace Conference, and negotiations with representatives of the Ottoman Empire and later the Russian Soviet Federative Socialist Republic. The Allied Powers attempted mediation through commissions and accords, while Bolshevik diplomacy linked recognition and territorial adjudication to the spread of Soviet power in the region, exemplified by treaties and decrees issued by the People's Commissariat for Foreign Affairs. Armenian appeals to entities like the League of Nations and Azerbaijani engagement with the Ottoman Porte and British authorities in Persia reflected converging efforts to secure international legitimacy. Military interventions by external forces—Ottoman Ninth Army remnants, British occupation forces in Baku, and later the Red Army—proved decisive in shaping outcomes.

Aftermath and Consequences

The end of sustained hostilities coincided with the sovietisation of the First Republic of Armenia and the Azerbaijan Democratic Republic in 1920–1921, incorporation into the Transcaucasian Socialist Federative Soviet Republic, and eventual delineation of borders under Soviet Union authority, decisions that determined the status of Nagorno-Karabakh, Nakhchivan Autonomous Soviet Socialist Republic, and Zangezur within the Armenian Soviet Socialist Republic and the Azerbaijan Soviet Socialist Republic. Long-term consequences included entrenched territorial disputes, population shifts involving Armenian diaspora movements and Azerbaijani internal migrations, and legacies influencing later conflicts in the late 20th and early 21st centuries involving entities such as the Republic of Artsakh, the Republic of Azerbaijan, and international mediators like the OSCE Minsk Group. Judicial and historical debates over responsibility, wartime conduct, and demographic change remain subjects of scholarly work in institutions including the Institute of History of the Armenian Academy of Sciences and the Azerbaijan National Academy of Sciences.

Category:Conflicts in 1918 Category:Conflicts in 1919 Category:Conflicts in 1920