Another man fell beside the ram. This time the senior centurion threw his shield down and took the vacant position. Once again the ram slammed forward. With a crack, the central beam on the gate broke in two, and the surrounding timbers were wrenched out of alignment. Through the gaps the Romans could see the snarling faces of Durotriges and Druids massed on the other side. Through a narrow gap Vespasian spotted the locking bar.

‘There!’ He raised a hand to point. ‘Shift the head to there!’

The line of the ram was quickly adjusted, and they swung again, forcing the gap to open wider. The locking bar shuddered in its brackets.

‘Harder!’ Vespasian shouted above the din. ‘Harder!’

Each blow splintered more of the timbers until with a last wild swing the locking bar shattered. Immediately the gates gave way.

‘Get the ram back!’

They backed up several feet and laid it down. Someone handed Vespasian a shield. He slipped his left arm into the straps and drew his sword, holding it horizontally at hip height. He breathed deeply, ready to lead his men through the gateway.

‘Eagle-bearer!’

‘Sir!’

‘Stay close to me, lad:

‘Yes, sir!’

‘First Cohort!’ the legate bellowed at the top of his voice. ‘Advance!’

With a deep roar from hundreds of throats, the scarlet shields charged the gates and crashed into the screaming ranks of the tribesmen beyond. Packed in with the front rank of the First Cohort Vespasian kept his shield up and thrust into the dense mass of humanity before him, sinking his blade into flesh, then twisting and wrenching it back, before striking again. All around him men screamed, shouted their warcries, grunting with the effort of each thrust and slash, crying out in agony as they were wounded. The dead and injured fell to the ground, those still living struggled to protect themselves beneath their shields and avoid being trampled to death.

At first, the dense mass of Romans and Durotriges was locked solid, neither giving an inch of ground. But as men fell, the tribesmen began to give ground, thrust back before the shield wall of the Romans. The ground beneath Vespasian’s boots was slick with churned mud and warm blood. His greatest fear at that moment was that he might lose his footing and slip.

The First Cohort ground forward, hacking a path through the Durotriges. The defenders, urged on by the Druids in their ranks, fought with desperate courage. Tightly packed as they were, their long swords and war spears were almost impossible to wield effectively. Some dropped their main weapons and used their daggers instead, trying to wrench the Roman shields aside and stab at the men sheltering behind. But few of the Durotriges were armoured and their exposed flesh was easy prey for the lethal swords of the legionaries.