Only Zosimus mentioned two invasions, contrasting with many scholars who argue in favor of an initial invasion and no retreat (followed by a reinforcement, which took Alexandria by the end of 270). During the Egyptian campaign, Rome was entangled in a succession crisis between Claudius' brother Quintillus and the general Aurelian. Egyptian papyri and coinage confirm Palmyrene rule in Egypt; the papyri stopped using the regnal years of the emperors from September to November 270, due to the succession crisis. By December regnal dating was resumed, with the papyri using the regnal years of the prevailing emperor Aurelian and Zenobia's son Vaballathus. Egyptian coinage was issued in the names of Aurelian and the Palmyrene king by November 270. There is no evidence that Zenobia ever visited Egypt.