Battle of Ašmena
1432 CE.
Shown on the map at 54.450°, 25.900°.
The Battle of Ashmyany or Ašmena (Lithuanian: Ašmenos mūšis) was fought on 8 December 1432 at Ashmyany between the armies of Švitrigaila and Sigismund Kęstutaitis, two pretenders to the throne of the Grand Duchy of Lithuania during the Lithuanian Civil War (1432–1438).
Text from the Wikipedia article Battle of Ashmyany, licensed CC BY-SA 4.0.