What happened September 249 AD

Overwhelmed by the number of invasions and usurpers, Philip offered to resign, but the Senate decided to throw its support behind the emperor, with a certain Gaius Messius Quintus Decius most vocal of all the senators. Philip was so impressed by his support that he dispatched Decius to the region with a special command encompassing all of the Pannonian and Moesian provinces. This had a dual purpose of both quelling the rebellion of Pacatianus as well as dealing with the barbarian incursions. Although Decius managed to quell the revolt, discontent in the legions was growing. Decius was proclaimed emperor by the Danubian armies in the spring of 249 and immediately marched on Rome.

Although Decius tried to come to terms with Philip, Philip's army met the usurper near modern Verona that summer. Decius easily won the battle and Philip was killed sometime in September 249, either in the fighting or assassinated by his own soldiers who were eager to please the new ruler. Philip's eleven-year-old son and heir may have been killed with his father and Priscus disappeared without a trace.