He and other officers of the legion were sent out to negotiate provisions for the winter of 56–55 BC; they were captured by Breton tribes who were then subjugated as Caesar describes in his Commentarii de Bello Gallico:
Legion officers, including the man, were sent out to acquire provisions for the winter of 56–55 BC; these officers were taken captive by Breton tribes, as described by Caesar in his Commentarii de Bello Gallico.