The soldiers of legions X "Equestris" and IX "Triumphalis" on the left flank, having thrown their pilae at their Atrebates opponents, charged. They threw the enemy back and drove them into the river, killing many. The Romans crossed the river and found themselves on disadvantageous or uneven ground, but although the Atrebates regrouped and launched a counter-attack, the Romans put them to flight a second time. Further along, in the centre, two legions, XI and VIII, having checked the Viromandui with whom they were engaged, pushed them from the higher ground into the river.