Galba

Moreover, Plato[*](Cf. e.g. Republic 376 C.) sees that a good commander or general can do nothing unless his army is amenable and loyal; and he thinks that the quality of obedience, like the quality characteristic of a king, requires a noble nature and a philosophic training, which, above all things, blends harmoniously the qualities of gentleness and humanity with those of high courage and aggressiveness. Many dire events, and particularly those which befell the Romans after the death of Nero, bear witness to this, and show plainly that an empire has nothing more fearful to show than a military force given over to untrained and unreasoning impulses.

Demades, indeed, after Alexander had died, likened the Macedonian army to the blinded Cyclops, observing the many random and disorderly movements that it made; but the Roman Empire was a prey to convulsions and disasters like those caused by the Titans of mythology, being torn into many fragments, and again in many places collapsing upon itself, not so much through the ambition of those who were proclaimed emperors, as through the greed and licence of the soldiery, which drove out one commander with another as nail drives out nail.[*](An allusion to the proverb ἥλῳ ὁ ἧλος ἐκκρούεται..)