Battle of Kalavrye
1078 CE.
Shown on the map at 41.111°, 28.098°.
The Battle of Kalavrye (also Kalavryai or Kalavryta) was fought in 1078 between the Byzantine imperial forces of general (and future emperor) Alexios Komnenos and the rebellious governor of Dyrrhachium, Nikephoros Bryennios the Elder. Bryennios had rebelled against Michael VII Doukas (r. 1071–1078) and had won over the allegiance of the Byzantine army's regular regiments in the Balkans. Even after Doukas's overthrow by Nikephoros III Botaneiates (r. 1078–1081), Bryennios continued his revolt, and threatened Constantinople. After failed negotiations, Botaneiates sent the young general Alexios Komnenos with whatever forces he could gather to confront him. The two armies clashed at Kalavrye on the Halmyros River in what is now European Turkey. Alexios Komnenos, whose army was considerably smaller and far less experienced, tried to ambush Bryennios's army. The ambush failed, and the wings of his own army were driven back by the rebels. Alexios barely managed to break through with his personal retinue, but succeeded in regrouping his scattered men.
Text from the Wikipedia article Battle of Kalavrye, licensed CC BY-SA 4.0.