 Zosimus and the "Historia Augusta" said that Philip the Arab conspired to have him killed by sabotaging supplies to turn the army against him.Orosius, Festus, John of Antioch and Eutropius assert that Philip the Arab played a more direct role in having him killed, beginning to conspire after Gordian III won a great victory in Persia.George Syncellus and the "Epitome de Caesaribus" say that Philip began conspiring against him before the army had reached Ctesiphon and not after a great victory.