After the death of Nero in 68, Rome saw a succession of short-lived emperors and a year of
civil wars. Galba was murdered by
Otho, who was defeated by
Vitellius. Otho's supporters, looking for another candidate to support, settled on Vespasian.
According to Suetonius, a prophecy ubiquitous in the Eastern provinces claimed that from Judaea would come the future rulers of the world. Vespasian eventually believed that this prophecy applied to him, and found a number of
omens, oracles, and
portents that reinforced this belief.
He also found encouragement in Mucianus, the governor of Syria; and, although Vespasian was a strict disciplinarian and reformer of abuses, Vespasian's soldiers were thoroughly devoted to him. All eyes in the East were now upon him. Mucianus and the Syrian legions were eager to support him. While he was at
Caesarea, he was proclaimed emperor (
July 1, 69), first by the army in
Egypt under
Tiberius Julius Alexander, and then by his troops in Iudaea (July 11).
Nevertheless,
Vitellius, the occupant of the throne, had Rome's best troops on his side — the veteran legions of
Gaul and the
Rhineland. But the feeling in Vespasian's favour quickly gathered strength, and the armies of
Moesia, Pannonia, and
Illyricum soon declared for him, and made him the
de facto master of half of the Roman world.
While Vespasian himself was in Egypt securing its
grain supply, his troops entered Italy from the northeast under the leadership of
M. Antonius Primus. They defeated Vitellius's army (which had awaited him in
Mevania) at
Bedriacum (or Betriacum), sacked
Cremona and advanced on Rome. They entered Rome after furious fighting. In the resulting confusion, the Capitol was destroyed by fire and Vespasian's brother Sabinus was killed by a mob.
On receiving the tidings of his rival's defeat and death at
Alexandria, the new emperor at once forwarded supplies of urgently needed grain to Rome, along with an edict or a declaration of policy, in which he gave assurance of an entire reversal of the laws of Nero, especially those relating to
treason. While in Egypt he visited the Temple of
Serapis, where reportedly he experienced a
vision. Later he was confronted by two labourers who were convinced that he possessed a divine power that could work
miracles.