The historian’s elbows buckled as an arrow struck his shield a solid blow. Three more rapped down in quick succession, all glancing impacts that then skittered away across other shields.

The air beneath the shields grew sour and turgid – sweat, urine and a growing anger. An attack that could not be answered was a soldier’s nightmare. The determination to reach the crest, where waited howling Semk and Guran heavy infantry, burned like a fever. Duiker knew that the marines were being driven towards a threshold. The first contact would be explosive.

The ramp was banked on either side closer to the ridge, steep and high, its top flattened and broad across. Warriors from a tribe Duiker could not identify – Can’eld? – began assembling on the banks and readying short horn bows. They’ll fire down on us from both sides once we lock with the Semk and Guran. An enfilade.

Bult rode with the flanking Crow horsewarriors, and the historian clearly heard the veteran’s bellowing command. In a flash of dust and iron, riders wheeled and swept towards the banks. Arrows flew. The Can’eld – caught by the swiftness of the Wickan response – scattered. Bodies fell, tumbling down to the ramp. The Crow warriors rode along the ditch, raking the high bank with murderous missile fire. Within moments the flat top was clear of standing tribesmen.

A second shout reined in the horsewarriors, their lead riders less than a dozen paces from the bristling line of Semk and Guran. The sudden halt drew the wild Semk forward. Throwing axes flew end over end through the intervening space. Arrows darted in return fire.

The forward tip of the wedge surged as the marines saw the disorder in the enemy front line. Crow riders spun their horses, rising high in their saddles as they careered to avoid being pinned between the closing footsoldiers and inadvertently breaking up the marines’ momentum. They pulled clear with moments to spare.

The wedge struck.

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.