Battle of Lemberg
1918 CE.
Shown on the map at 49.830°, 24.014°.
The Battle of Lemberg (Lviv, Lwów) (in Polish historiography called obrona Lwowa, the Defense of Lwów) took place from November 1918 to May 1919 in the region of Galicia following the dissolution of the Austro-Hungarian Empire. The battle, for control over the city of Lviv, was fought between forces of the local West Ukrainian People's Republic and urban Polish resistance, assisted later by the invading Polish military. The battle sparked the Polish-Ukrainian War, ultimately won by Poland as both nations fought the Ukrainian-Soviet War and Polish-Soviet Wars concurrently.
Text from the Wikipedia article Battle of Lemberg (1918), licensed CC BY-SA 4.0.