Battle of Bolimów
1915 CE.
Shown on the map at 52.076°, 20.163°.
The Battle of Humin-Bolimów was an inconclusive battle of World War I fought between January 14 and February 28, 1915 between the Imperial German Army and Russia. The battle is considered a preliminary to the Second Battle of the Masurian Lakes.
Text from the Wikipedia article Battle of Humin-Bolimów, licensed CC BY-SA 4.0.