Siege of Euripos
880 CE.
Shown on the map at 38.464°, 23.603°.
The siege of Euripos (modern Chalcis) occurred in the mid-880s, when an Abbasid fleet, led by the emir of Tarsos, Yazaman al-Khadim, laid siege to the city. The local Byzantine commander, Oiniates, successfully defended the city and destroyed a large part of the besieging force.
Text from the Wikipedia article Siege of Euripos, licensed CC BY-SA 4.0.