Cato beckoned to Junius and the others and then trotted back towards the centre of the line. He made a quick estimate of the cohort’s losses. No more than a tenth of the cavalry had been lost in the first struggle but the Nubians would surely make another charge. Each time they did, the cohort’s strength would be whittled down. The Nubian army must be broken before such attrition broke the Roman cavalry.

The small party of officers made their way across the rear of the Roman line and returned to the centre. Macro looked back and nodded a relieved acknowledgement that Cato was still alive, then turned to face the front. Over the helmets of the First Cohort, Cato could see the main bulk of the enemy army advancing straight at them, no more than half a mile away, dense blocks of infantry, with the most heavily armoured making up the centre of the line under the banner of Prince Talmis. Cato wondered if Ajax was there amongst them, with the last of his followers from Crete. For an instant he fervently hoped that fate would give him, or Macro, the chance to face the gladiator one last time to settle the consuming hatred that had brought all three men to this battlefield on the fringe of the Empire.

He thrust thoughts of Ajax aside and turned to one of his orderlies. ‘Tell the commanders of both bolt-thrower batteries to target the enemy infantry as soon as they come within range. The same order to the archers. Go.’

The officer nodded and wheeled his mount around and galloped off. Cato turned his attention back to the Nubians. It was impossible to gauge their number through the haze of dust rising up a short distance behind the leading ranks. If this was Prince Talmis’s main blow, then there could be more than twenty thousand men tramping across the level ground towards the Roman line, three men to each of Cato’s. The sheer weight of numbers would be certain to drive the small army back, which was what Cato had allowed for, indeed counted on, in his plan.

The steady rhythm of the enemy’s drums and the clash of cymbals and blare of horns swelled in volume as the host advanced. Once the centurions were satisfied that the lines of their men were dressed as smartly as possible, they took up their places at the right of their commands and waited in silence. The Nubians were now close enough for Cato to make out their officers shouting encouragement and waving their men on with their gleaming swords. There was a moment when Cato felt tempted to say something, some word of comfort to the men around him, but he realised it would only betray the anxiety that bound his stomach in a vice-like knot. Far better to remain silent and seem calm and imperturbable in the face of an approaching sea of enemies.