Second Battle of Adrianople
1913 CE.
Shown on the map at 41.677°, 26.556°.
The siege of Adrianople was a 1913 siege by the Ottoman Empire of Adrianople (modern-day Edirne, Turkey), which was defended by Bulgaria during the Second Balkan War. The Ottoman Empire recaptured Edirne.
Text from the Wikipedia article Siege of Adrianople (1913), licensed CC BY-SA 4.0.