Armenian–Azerbaijani War

An armed conflict between the First Republics of Armenia and Azerbaijan from 1918 to 1920, fought over disputed territories including Nagorno-Karabakh and Nakhchivan.

Russian Revolution: The revolutionary upheavals of 1917 that ended the Russian Empire and brought the Bolsheviks to power. The empire's collapse removed the authority that had contained regional disputes in the South Caucasus.
Nagorno-Karabakh: A mountainous region in the South Caucasus with a historically Armenian-majority population and a long-disputed political status. Armenian and Azerbaijani claims to the region repeatedly produced armed confrontations.
Andranik Ozanian: An Armenian military commander and revolutionary leader active in the late Ottoman and South Caucasus conflicts. His forces operated in Zangezur and resisted Azerbaijani efforts to establish control there.
Sovietization of Armenia: The establishment of Soviet rule in Armenia in late 1920, ending the First Republic. It ended Armenia's capacity to continue the interstate conflict as an independent republic.
Transcaucasian Democratic Federative Republic: A short-lived federation of Armenia, Azerbaijan, and Georgia established in 1918. Its dissolution left the new republics to pursue competing territorial claims independently.
Nakhchivan: An Azerbaijani exclave bordered by Armenia, Iran, and Turkey. Competing claims and local violence made the exclave a major theater of the conflict.
Khosrov bey Sultanov: An Azerbaijani political and military figure appointed governor-general of Karabakh and Zangezur in 1919. His appointment by Baku provoked Armenian opposition and helped trigger the 1920 Karabakh uprising.
Sovietization of Azerbaijan: The establishment of Soviet rule in Azerbaijan in 1920, ending the Azerbaijan Democratic Republic. It replaced the Azerbaijani government whose territorial claims had driven much of the fighting.
First Republic of Armenia: An independent Armenian state that existed from 1918 until Sovietization in 1920. Its government fought to retain Armenian-populated areas claimed by Azerbaijan.
Zangezur: A mountainous region in present-day southern Armenia, historically contested by Armenian and Azerbaijani forces. Control of Zangezur shaped the territorial connection between Azerbaijan and Nakhchivan.

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Armeno-Georgian WarCompared with: It was a separate border conflict between neighboring republics, not the Georgian-Armenian war.