Revolt of the Ingrian Finns
1918 CE.
Shown on the map at 60.050°, 31.750°.
The Revolt of the Ingrian Finns (Finnish: Inkeriläisten kansannousu, also known as Inkerin vapaustaistelu) was an uprising of Ingrian Finns in Ingria during the Russian Civil War and Heimosodat. The uprising began as small pockets of resistance in 1918, with organized resistance efforts beginning in January 1919 with the establishment of both the Temporary Caretaker Committee of Northern and Western Ingria, and lasting until the collapse of the Kirjasalo Republic on 5 December 1920.
Text from the Wikipedia article Revolt of the Ingrian Finns, licensed CC BY-SA 4.0.