Battle of Jajce
1878 CE.
Shown on the map at 44.340°, 17.269°.
The Battle of Jajce was a military engagement between Austria-Hungary and Bosnian rebels supported by the Ottoman Empire that took place on August 7, 1878, as part of the Austro-Hungarian military campaign in Bosnia (Bosnia vilayet) in the for control of the strategic town of Jajce. This was one of the most extensive engagements of the entire campaign, in which the Austro-Hungarian Expeditionary Forces suffered more than six hundred casualties, the heaviest losses during one day of the entire campaign.
Text from the Wikipedia article Battle of Jajce (1878), licensed CC BY-SA 4.0.