The campaign was four hours old.

The Prussian guns withdrew north of Charleroi. The artillery officer wondered why no one had thought to blow up the bridge which crossed the River Sambre in the centre of the town, but he supposed there must be fords close to Charleroi which would have made the destruction of the fine stone bridge into a futile and even petulant gesture. Once the guns had gone, the black-uniformed Prussian cavalry waited in the town north of the river, reinforcing the brigade of infantry that ransacked the houses near the bridge for furniture, which they rather half-heartedly made into a barricade at the bridge’s northern end. The townspeople sensibly stayed indoors and closed their shutters. Many of them took their carefully stored tricolours from their hiding places. Belgium had been a part of France till just a year before, and many folk in this part of the province resented being made a part of the Netherlands.

The French approached Charleroi on all the southern roads. The inevitable greencoated Dragoons reached the town first, followed by Cuirassiers and Red Lancers. None of the horsemen tried to force a passage across the barricaded bridge. Instead the Red Lancers, many of whom were Belgians, trotted eastwards in search of a ford. On the river’s northern bank a troop of black-uniformed Prussian Hussars shadowed the Red Lancers, and it was those Hussars who, rounding a bend in the Sambre Valley, discovered a party of French engineers floating a pontoon bridge off the southern bank. Six of the engineers had swum to the northern bank where they were fastening a rope to a great elm tree. The Hussars drew their sabres to drive the unarmed men back into the river, but French artillery had already closed on the southern bank and, as soon as the Hussars went into the trot, the first roundshot slammed across the water. It bounced a few yards ahead of the Hussars’ advance, then slammed into a wood where it tore and crashed through the thickly leaved branches.