Second Battle of Oituz
1917 CE.
Shown on the map at 46.209°, 26.441°.
The Third Battle of Oituz was a confrontation between Romanian and, to a lesser extent, Russian forces on one side and German and Austro-Hungarian forces on the other, during the Romanian Campaign of World War I. The battle took place primarily in the Oituz valley on the border between Hungary and Romania, from 8 to 22 August 1917.
Text from the Wikipedia article Third Battle of Oituz, licensed CC BY-SA 4.0.