The battle started just before dawn as the Light Division headed towards the plateau on the summit of the Greater Rhune (the summit had been garrisoned by French troops but they had fled after the skirmish on the River Bidassoa, fearing to be cut off from their own army). The objective of the division was to sweep the three defensive forts the French had constructed out of the battle. They moved down into the ravine in front of the Lesser Rhune and were ordered to lie down and await the order to attack. After the signal from a battery of cannon, the offensive began. It started with the men of the 43rd, 52nd and 95th – with the 17th Portuguese infantry Regiment in support – storming the redoubts on the crest of the Rhune. Despite this being a risky move and the men being almost exhausted, the surprise and boldness of the British sent the French fleeing towards other forts on other hills.