Procopius

Procopius was a distant relative of the emperor Julian the Apostate.^note[Zosimus, New History 4.7.1.] During Julian's Persian campaign, Procopius guarded the Upper Tigris valley.^note[Zosimus, New History 4.4.2.] When Julian was killed in action (June 363), Procopius (who may have expected to be recognized as emperor himself), recognized Jovian, who had been chosen emperor by the army.^note[Zosimus, New History 4.4.3.]

During Jovian's reign, Procopius was living with his relatives in a villa in Caesarea.^note[Zosimus, New History 4.4.3.] When Jovian was succeeded by Valens (February 364), Procopius revolted, picking up allies on the Crimea^note[Zosimus, New History 4.5.2.] and finding friends in Constantinople, where a former courtier named Eugenius supported him.^note[Zosimus, New History 4.5.2.] However, his armies were defeated at Thyatira^note[Zosimus, New History 4.8.1.] and Nacolaeia^note[Zosimus, New History 4.8.3.] and he was executed (366).

The main sources are Ammianus Marcellinus and Zosimus.