The Severan forces, commanded by Publius Cornelius Anullinus, won the battle, and Niger was captured and killed shortly afterwards.
Pescennius Niger was the Roman governor of Syria who had been acclaimed Emperor by his troops, like Severus, following the death of Pertinax.
At this time, the commander of the Severan troops, Tiberius Claudius Candidus, was replaced by Publius Cornelius Anullinus, perhaps due to the failure of the former to prevent the withdrawal of the rival army.
A sudden thunderstorm played some role in lowering the morale of Niger's troops, who were directly facing it, because they had attributed it to divine intervention.
[1] While this battle concluded hostilities on the field between the two rivals for control of the East (Niger was captured and killed, a few days later), the city of Byzantium withstood a siege by Severan troops until AD 196, possibly on the hope that a third rival to the principate, the governor of Britain Clodius Albinus, nominally allied with Niger, would defeat Severus in the West.