Battle of Blumenau
1866 CE.
Shown on the map at 48.192°, 17.054°.
The Battle of Blumenau or Battle of Lamač was the last battle fought in the Austro-Prussian War, on 22 July 1866 (on the day of the conclusion of peace), with the Austrians defending against the Prussian army.
Text from the Wikipedia article Battle of Blumenau, licensed CC BY-SA 4.0.