Through the shield Duiker felt the impact’s thunder, a resounding roll that jarred his bones. He could see little from his position apart from a small patch of blue sky directly above the heads of the soldiers, and into that air spun a snapped pike-shaft and a helm that might have still held in its strap a bearded jaw, before dust rose up in an impenetrable shroud.

‘Sir!’ A hand tugged at his shield arm. ‘You’re to turn now!’

Turn? Duiker glared at List.

The corporal pulled him round. ‘So you can see, sir—’

They were standing in the next to last line of the wedge. A space of ten paces yawned between the marines and the mounted, arcanely armoured Foolish Dog horsewarriors, who stood motionless, heavy swords bared and resting crossways across their saddles. Beyond them, the basin stretched – the historian’s position high on the earthen ramp afforded him a view of the rest of the battle.

To the south were closed ranks of Tithansi archers supported by Debrahl cavalry. Legions of Halafan infantry marched east of them – to their right – and in their midst a company of Sialk heavy infantry. Further east were more cavalry and archers. One jaw, and to the north, the other. Now inexorably snapping shut.

He looked to the north. The Ubari legions – at least three – along with Sialk and Tepasi cavalry, were less than fifty paces from contacting the Seventh’s infantry. Among the standards jutting from the Ubari, Duiker saw a flash of grey and black colours. Marine-trained locals, now there’s irony for you.

East of the river a huge battle was underway, if the vast pall of drifting dust was any indication. The Weasel Clan had found their fight after all. The historian wondered which of Kamist Reloe’s forces had managed to circle round. A strike for the herds, and the gift of slaughter among the refugees. Hold fast, Weasels, you’ll get no relief from the rest of us.

Jostling from the soldiers around him brought Duiker’s attention back to his immediate surroundings. The clash of weapons and screams from the ridge was growing as the wedge slowly flattened out against an anvil of stiff, disciplined resistance. The first reeling knock-back rippled through the press.

Togg’s three masks of war. Before the day’s done we’ll each of us wear them all. Terror, rage and pain. We won’t take the ridge—

A deeper roar sounded in the basin behind them. The historian twisted around. The jaws had closed. The Seventh’s hollow box around the wagons of the wounded was crumpling, writhing, like a worm beset by ants. Duiker stared, a wave of dread rising within him, expecting to see that box disintegrate, torn apart by the ferocity assailing it.