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.

In 1091, the Pechenegs invaded the Byzantine Empire and were crushingly defeated by John II's father Alexios I Komnenos (r. 1081–1118) at the Battle of Levounion.

[1] According to Michael Angold, it is possible that their invasion took place with the connivance of Vladimir Monomakh (r. 1113–1125), the ruler of Kiev, given that the Pechenegs had once been his auxiliaries.

The Pechenegs were successfully duped by this deception and were therefore taken by surprise when the Byzantines suddenly launched a major attack on their defensive wagon fort, or laager.

[3] This defence proved effective, and it was not until John led the Varangian Guard, the elite heavy infantry force of the Byzantine emperors, against the wagons that their protection was breached.