Battle of Kalamata
1821 CE.
Shown on the map at 37.017°, 22.100°.
The Liberation of Kalamata took place on 23 March (O.S.) 1821 when Greek irregular revolutionary forces took control of the city after the surrender of the Ottoman garrison, without fighting. It was one of the first events of the Greek War of Independence. Kalamata became the first major town to be liberated.
Text from the Wikipedia article Liberation of Kalamata, licensed CC BY-SA 4.0.