Histories 2.83

1The first move to confer empire on Vespasian was made at Alexandria, through the haste of Tiberius Alexander, who on the first of July bound the legions by oath to him. 1And this day was afterwards celebrated as the first of his principate, although the army of Judaea had sworn to him in person on the third of July, with such eagerness that not even his son Titus was waited for, who was returning from Syria and carrying messages about their plans between Mucianus and his father. 1Everything was done on the impulse of the soldiers, without a prepared assembly, without the legions being brought together.