The Sergeant was shouting for his men to advance. A trumpet called behind, ordering another troop to file right into a field of growing wheat. A trooper shot the Lieutenant’s horse, leaning from his saddle to put the bullet plumb into the beast’s skull. Another horse fell, this one with a leg bone shattered by a musket-ball. A Dragoon was lying in the ditch, his helmet fallen into a nettle patch. Horses crashed past the wounded Lieutenant, their hooves spurting mud and road-flints into the air. The Sergeant’s long sword shone silver.

More shots, but this time the gouts of white smoke were scattered more thinly along the hedgerow. “They’re retreating, sir!” the Sergeant shouted to an officer far behind him, then, not waiting for any orders, spurred his horse forward. “Charge!”

The French Dragoons swept past the line of the hedge. They could see no enemy in the long-shadowed landscape, but they knew the ambushers had to be close. The Sergeant, suspecting that the enemy infantry was hiding in the mist-skeined wheat field, turned his horse off the lane, forced it through a ditch and so up into the wheat. He saw movement at the far side of the field, close by a dark-leafed wood. The movement resolved into men running towards the trees. The men wore dark blue uniform coats and had black shakos with silver rims. Prussian infantry. “There they are!” The Sergeant pointed at the enemy with his sword. “After the bastards!”

Thirty Dragoons followed the Sergeant. They thrust their carbines into the bucket holsters on their saddles and dragged out their long straight-bladed swords. Prussian muskets pricked flame from the wood’s edge, but the shooting was at too long a range and only one French horse tumbled into the wheat. The remaining Dragoons swept on. The enemy picquet that had ambushed the French vanguard was hurrying to the shelter of the wood, but some of them had left their retreat too late and the Dragoons caught them. The Sergeant galloped past a man and cut back with a savage slash of his sword.