The Count D'Alencon, furious at their hesitation, ordered them up, but as they advanced a terrible thunderstorm, with torrents of rain, broke over the armies, and wetting the cords of the crossbows rendered many of them unserviceable.

At length the crossbow-men were arranged in front, while behind them were the vast body of French cavalry, and the order was given for the battle to begin.
The Genoese advanced with loud shouts but the English archers paid no attention to the noise, but waited calmly for the attack.

At this moment the sun, now approaching the west, shone out brightly between the clouds behind the English, its rays streaming full in the faces of the French.
The Genoese were now within distance, and began to discharge their quarrels at their impassive enemies, but as they opened fire the English archers drew their bows from the cases which had protected them from the rain, and stepping forward poured their arrows among the Genoese.

The crossbow-men were smitten as with a storm, numbers were struck in the face and other unprotected parts, and they were instantly thrown into confusion, and casting away their cross-bows they recoiled in disorder among the horsemen behind them.
Phillip, passionate and cruel as ever, instead of trying to rally the Genoese, ordered the cavalry behind them to fall upon them, and the men-at-arms at once plunged in among the disordered mass of the crossbow-men, and a wild scene of carnage and confusion ensued, the English archers continuing to pour their unerring arrows into the midst.
The Count D'Alencon, who was behind, separated his division into two bodies, and swept round on one side himself, while the Count of Flanders did the same on the other to attack the Prince of Wales in more regular array.

Taking a circuitous route, D'Alencon appeared upon a rising ground on the flank of the archers of the Black Prince, and thus, avoiding their arrows, charged down with his cavalry upon the 800 men-at-arms gathered round the Black Prince, while the Count of Flanders attacked on the other flank.