3. For the plan proposed and very anxiously prepared was, that the Allemanni, who were in a state of greater rage than ever, and were extending their incursions more widely, should be caught between our two armies, as if between the arms of a pair of pincers, and so driven into a corner and destroyed. 4. But while these well-devised plans were being pressed forward, the barbarians, in joy at some success which they had obtained, and skilful in seizing every opportunity for plunder, passed secretly between the camps of the armies, and attacked Lyons unexpectedly. And having plundered the district around, they would have stormed and burnt the city itself, if they had not found the gates so strongly defended that they were repulsed; so that they only destroyed all they could find outside the city. 5. When this disaster was known, Cæsar, with great alacrity, despatched three squadrons of light cavalry, of approved valour, to watch three lines of road, knowing that beyond all question the invaders must quit the district by one of them. 6. Nor was he mistaken; for all who came by these roads were slaughtered by our men, and the whole of the booty which they were carrying off was recovered unhurt. Those alone escaped in safety who passed by the camp of Barbatio, who were suffered to escape in that direction because Bainobaudes the tribune, and Valentinian (afterwards emperor), who had been appointed to watch that pass with the squadrons of cavalry under their orders, were forbidden by Cella (the tribune of the Scutarii, who had been sent as colleague to Barbatio) to occupy that road, though they were sure that by that the Germans would return to their own country. 7. The cowardly master of the horse, being also an obstinate enemy to the glory of Julian, was not contented with this, but being conscious that he had given orders inconsistent with the interests of Rome (for when he was accused of it Cella confessed what he had done), he made a false report to Constantius, and told him that these same tribunes had, under a pretence of the business of the state, came thither for the purpose of tampering with the soldiers whom he commanded. And owing to this statement they were deprived of their commands, and returned home as private individuals.