Battle of Beroia
1122 CE.
Shown on the map at 42.433°, 25.650°.
The Battle of Beroia (modern Stara Zagora) was fought in 1122 between the Pechenegs and the Byzantine Empire under Emperor John II Komnenos (r. 1118–1143) in what is now Bulgaria. The Byzantine army won the battle, resulting in the disappearance of the Pechenegs as a distinct, independent people.
Text from the Wikipedia article Battle of Beroia, licensed CC BY-SA 4.0.