Armenian–Azerbaijani war (1918–1920)

The Armenian-Azerbaijani war (1918–1920) was a conflict that took place in the South Caucasus in regions with a mixed Armenian-Azerbaijani population, broadly encompassing what are now modern-day Azerbaijan and Armenia. It began during the final months of World War I and ended with the establishment of Soviet rule.

Source: Wikipedia — Armenian–Azerbaijani war (1918–1920) (CC BY-SA 4.0)