But the forces in Germany broke out into their mutiny whilst he was yet deliberating, and anticipated his design. All the soldiers in general felt much resentment against Galba for not having given them their expected largess, but these troops made a pretence of a more particular concern, that Virginius Rufus was cast off dishonourably, and that the bad who had fought with them were well rewarded, while those who had refused to take part with Vindex were punished; and Galba's thanks seemed all to be for him, to whose memory he had done honour after his death with public solemnities as though he had been made emperor by his means only. Whilst these discourses passed openly throughout the army, on the first day of the first month of the year, the Calends, as they call it, of January, Flaccus summoning them to take the usual anniversary oath of fealty to the emperor, they overturned and pulled down Galba's statues, and having sworn in the name of the senate and people of Rome, departed. But the officers now feared anarchy and confusion, as much as rebellion;and one of them came forward and said: "What will become of us, my fellow-soldiers, if we neither set up another general, nor retain the present one? This will be not so much to desert from Galba as to decline all subjection and command. It is useless to try and maintain Flaccus Hordeonius, who is but a mere shadow and image of Galba. But Vitellius, commander of the other Germany, is but one day's march distant, whose father was censor and thrice consul, and in a manner co-emperor with Claudius Caesar; and he himself has the best proof to show of his bounty and largeness of mind, in the poverty with which some reproach him. Him let us make choice of, that all may see we know how to choose an emperor better than either Spaniards or Lusitanians." Which motion whilst some assented to, and others gainsaid, a certain standard-bearer slipped out and carried the news to Vitellius, who was entertaining much company by night. This taking air, soon passed through the troops, and Fabius Valens, who commanded one legion, riding up next day with a large body of horse, saluted Vitellius emperor. He had hitherto seemed to decline it, professing a dread he had to undertake the weight of the government;but on this day, being fortified, they say, by wine and a plentiful noon-day repast, he began to yield, and submitted to take on him the title of Germanicus they gave him, but desired to be excused as to that of Caesar. And immediately the army under Flaccus also, putting away their fine and popular oaths in the name of the senate, swore obedience to Vitellius as emperor, to observe whatever he commanded.
Thus Vitellius was publicly proclaimed emperor in Germany; which news coming to Galba's ear, he no longer deferred his adoption; yet knowing that some of his friends were using their interest for Dolabella, and the greatest number of them for Otho, neither of whom he approved of, on a sudden, without any one's privity, he sent for Piso, the son of Crassus and Scribonia, whom Nero slew, a young man in general of excellent disposition for virtue, but his most eminent qualities those of steadiness and austere gravity. And so he set out to go to the camp to declare him Caesar and successor to the empire.
But at his very first going forth many signs appeared in the heavens, and when he began to make a speech to the soldiers, partly extempore, and partly reading it, the frequent claps of thunder and flashes of lightning, and the violent storm of rain that burst on both the camp and the city, were plain discoveries that the divine powers did not look with favour or satisfaction on this act of adoption that would come to no good result. The soldiers, also, showed symptoms of hidden discontent, and wore sullen looks, no distribution of money being even now made to them. However, those that were present and observed Piso's countenance and voice could not but feel admiration to see him so little overcome by so great a favour, of the magnitude of which at the same time he seemed not at all insensible. Otho's aspect, on the other hand, did not fail to let many marks appear of his bitterness and anger at his disappointment;since to have been the first man thought of for it, and to have come to the very point of being chosen, and now to be put by, was in his feelings a sign of the displeasure and ill-will of Galba towards him. This filled him with fears and apprehensions, and sent him home with a mind full of various passions, whilst he dreaded Piso, hated Galba, and was full of wrath and indignation against Vinius. And the Chaldeans and soothsayers about him would not permit him to lay aside his hopes or quit his design, chiefly Ptolemaeus, insisting much on a prediction he had made, that Nero should not murder Otho, but he himself should die first, and Otho succeed as emperor; for the first proving true, he thought he could not distrust the rest. But none perhaps stimulated him more than those that professed privately to pity his hard fate and compassionate him for being thus ungratefully dealt with by Galba; especially Nymphidius's and Tigellinus's creatures, who, being now cast off and reduced to low estate, were eager to put themselves upon him, exclaiming at the indignity he had suffered, and provoking him to revenge himself.
Amongst these were Viturius and Barbius, the one an optio, the other a tesserarius (these are men who have the duties of messengers and scouts), with whom Onomastus, one of Otho's freedmen, went to the camp, to tamper with the army, and brought over some with money, others with fair promises, which was no hard matter, they being already corrupted, and only wanting a fair pretence. It had been otherwise more than the work of four days (which elapsed between the adoption and murder), so completely to infect them as to cause a general revolt. On the sixth day ensuing, the eighteenth, as the Romans call it, before the Calends of February, the murder was done.