The Annals and the Histories · Hist. 2.26

Then the Othonianist infantry charged. The enemy's line was completely crushed, and the reinforcements who were coming up to their aid were also put to flight. Caecina indeed had not brought up his cohorts in a body, but one by one; as this was done during the battle, it increased the general confusion, because the troops who were thus divided, not being strong at any one point, were borne away by the panic of the fugitives. Besides this, a mutiny broke out in the camp because the whole army was not led into action. Julius Gratus, prefect of the camp, was put in irons, on a suspicion of a treacherous understanding with his brother who was serving with Otho's army, at the very time that the Othonianists had done the same thing and on the same grounds to that brother Julius Fronto, a tribune. In fact such was the panic everywhere, among the fugitives and among the troops coming up, in the…

Cornelius Tacitus · trans. Church & Brodribb, 1876
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