Res Gestae
Ammianus Marcellinus
Ammianus Marcellinus. Ammianus Marcellinus, with an English translation, Vols. I-III. Rolfe, John C., translator. Cambridge, MA; London: Harvard University Press; W. Heinemann, 1935-1940 (printing).
When the day was now declining to evening and the waning light warned them to do away with delay, the soldiers lifted up their standards and rushed upon them in a fiery attack. Thereupon the foe massed themselves together, and, huddled in close order, directed all their attack against the emperor himself, who, as was said, stood on higher ground, charging upon him with fierce looks and savage cries.
The furious madness of this onset
The praetorian cohort, which stood before Augustus and was carefully guarding him, fell upon the breasts of the resisting foe, and then upon their backs as they took flight. And the savages with invincible stubbornness showed as they fell, by their awful shrieking, that they did not so much resent death as the triumph of our soldiers; and besides the dead many lay about hamstrung and thus deprived of the means of flight, others had their right hands cut off, some were untouched by any steel but crushed by the weight of those who rushed over them; but all bore their anguish in deep silence.