Montcalm had the greatest difficulty in preventing the Indians, by means of threats, promises, and presents, from massacring the prisoners. Oswego was burned to the ground, the forts and vessels on the stocks destroyed, and, the place having been made a desert, the army returned with their prisoners and spoil to Montreal.

The loss of Oswego had inflicted a very severe blow to the influence and prestige of England, among the Indians of the lake districts, but this was partly restored by the failure of the French expedition against William Henry, early in the following spring.

The expedition against Louisbourg, to strengthen which the western frontier had been denuded of troops, proved a failure. A great delay had taken place at home, in consequence of ministerial changes, and it was not until the 5th of May that fifteen ships of the line and three frigates, under Admiral Holbourne, with 5000 troops on board, sailed from England for Halifax, where Loudon was to meet him with the forces from the colony. But, while the English fleet had been delaying, the French government had obtained information of its destination, and had sent three French squadrons across the Atlantic to Louisbourg.

It was the 10th of July before the united English force assembled at Halifax, and there fresh delays arose. The troops, nearly twelve thousand in number, were landed, and weeks were spent in idle drill.

At the beginning of August the forces were again embarked, when a sloop came in from Newfoundland, bringing letters which had been captured on board a French ship. From these, it appeared that there were twenty-two ships of the line, besides several frigates, in the harbour of Louisbourg, and that 7000 troops were in garrison, in what was by far the strongest fortress on the continent.

Success was now impossible, and the enterprise was abandoned. Loudon, with his troops, sailed back to New York; and Admiral Holbourne, who had been joined by four additional ships, sailed for Louisbourg, in hopes that the French fleet would come out and fight him. He cruised for some time off the port, but Lamotte, the French admiral, would not come out.

In September, a tremendous gale burst upon the British fleet: one ship was dashed on the rocks, a short distance from Louisbourg, and only a sudden shift of the wind saved the rest from a total destruction. Nine were dismasted, and others threw their cannon into the sea. Had Lamotte sailed out on the following day, the English fleet was at his mercy. Fortunately he did not do so, and Holbourne returned to England.

The French in Canada were aware that Loudon had gathered all his troops at New York, and was preparing for an expedition, which was to be aided by a fleet from England; but, thinking it probable that it was directed against Quebec, the most vital point in Canada, since its occupation by the English would entirely cut the colony off from France, Montcalm was obliged to keep his forces in hand near that town, and was unable to take advantage of the unprotected state in which Loudon had left the frontier of the colonies.

As soon, however, as, by despatch received from France, and by the statements of prisoners captured by the Indians on the frontier, Montcalm learned that the expedition, which had just left New York, was destined for Louisbourg, he was at liberty to utilize his army for the invasion of the defenceless colonies, and he determined to commence the campaign by the capture of Fort William Henry.

James Walsham, with his company of Royal Scouts, had spent the spring at Fort William Henry. Loudon had, at first, sent an order for the corps to be broken up, and the men to rejoin their respective regiments, and to accompany them on the expedition; but the earnest representations of Colonel Monro of the 35th Regiment, who was now in command, of the total inadequacy of the garrison to defend itself, should a serious attack be made from Ticonderoga; and of the great value to him of the corps under Captain Walsham, which was now thoroughly trained in forest fighting, induced him to countermand the order.