Battle of Kilkis
1944 CE.
Shown on the map at 40.983°, 22.867°.
The Battle of Kilkis was an armed conflict between communist resistance organisation ELAS and a coalition of collaborationist Security Battalions, nationalist resistance organisations EDES and the National Greek Army (EES). On 4 November 1944, ELAS captured Kilkis after nine hours of fighting. The nationalists suffered many casualties during the battle and in prisoner killings afterwards.
Text from the Wikipedia article Battle of Kilkis (1944), licensed CC BY-SA 4.0.