Battle of Oltu
1920 CE.
Shown on the map at 40.550°, 42.000°.
The Battles of Oltu were two armed conflicts; the first (18–25 June 1920) took place between Armenia and Turkish militias in the Oltu region, which at this time was part of Armenia. The second battle was fought on 3–5 September 1920, marking the beginning of the Turkish invasion of Armenia, resulting in Turkish forces driving the Armenians out of Oltu.
Text from the Wikipedia article Battle of Oltu, licensed CC BY-SA 4.0.