Guided by Joseph Thierry, a Huguenot
river pilot, two British warships approached the fort that dominated Île d'Aix. The guns of the fort were bombarded into silence by the guns of of 74 guns, commanded by Captain
Richard Howe, soon joined by of 80 guns, and within two hours the island, considered a crucial starting point in any further assault on Rochefort, had fallen to the British. Wolfe observed the mainland from Ile d'Aix and he noted a battery of guns at Fort Fouras on the mainland, which guarded the mouth of the river
Charente. The French were totally unprepared to resist an assault, and had been taken completely by surprise by the appearance of the British fleet. Wolfe advocated an immediate assault on Fort Fouras, and also a diversionary raid in the direction of nearby
La Rochelle to confuse the French about the true intentions. Mordaunt agreed to an attack on Fort Fouras, but then had to cancel it when it was discovered that the water around it was too shallow for Hawke's ships to get close enough to bombard the fort. On 25 September Mordaunt held a council of war, where the optimistic estimates of the weakness of French defences at Rochefort were rejected, this decision being largely based on the uncertainty regarding the state of the ditch around Rochefort, which if wet would have prevented assault by escalade. It was decided that an attempt to capture Rochefort was "neither advisable nor practicable". Wolfe continued to press for a fresh assault, even though the element of surprise had now been lost, but Mordaunt was hesitant. It was still hoped that the French could in some way be harassed by the British forces and General Conway pushed Mordaunt to consider a fresh assault on Fouras, which was finally agreed at a second council of war in the morning of 28 September. A landing site near
Chatelaillon was selected despite the fears of Mordaunt that large French forces might be lurking behind the sand dunes. The troops embarked in the landing boats late that night; however, a strong wind arose and in conjunction with the tide this raised concerns about the length of time before reinforcements could be sent to support the first wave of troops. The landing was cancelled. ==Withdrawal==