 After this, the Praetorian Guard killed Pupienus and Balbinus, leaving Gordian III as the sole emperor.Gordian III ruled until 244AD when he was either killed after his betrayal by Philip the Arab, killed by Philip the Arab or killed at the Battle of Misiche; with his death, the dynasty was ended and Philip the Arab became emperor.The Gordian dynasty was founded by Gordian I, the governor of "Africa Proconsularis" (Roman Africa).