Battle of Olszynka Grochowska
1831 CE.
Shown on the map at 52.249°, 21.108°.
The Battle of Olszynka Grochowska, or the battle of Grochów, was fought on 25 February 1831 in the woods near Grochów, on the eastern outskirts of Warsaw. The Polish army, commanded by Józef Chłopicki, succeeded in preventing its Russian counterpart, under Hans Karl von Diebitsch, from crushing the uprising. However, the battle has also been described as an inconclusive bloodbath.
Text from the Wikipedia article Battle of Olszynka Grochowska, licensed CC BY-SA 4.0.