Battle of Mărășești
1917 CE.
Shown on the map at 45.880°, 27.135°.
The Battle of Mărășești (6 August 1917 – 3 September 1917) was the last major battle fought by the Central Powers against the Kingdom of Romania and Russia on the Romanian front during World War I. Romania was mostly occupied by the Central Powers, but the Battle of Mărășești kept the northern region of the country free from occupation.
Text from the Wikipedia article Battle of Mărășești, licensed CC BY-SA 4.0.