 The campaign was a success and Gordian, who had joined the army, was planning an invasion of the enemy's territory, when his father-in-law died in unclear circumstances.Without Timesitheus, the campaign, and the Emperor's security, were at risk.Gaius Julius Priscus and, later on, his own brother Marcus Julius Philippus, also known as Philip the Arab, stepped in at this moment as the new Praetorian Prefects and the campaign proceeded.