The great struggle between France and England for supremacy in America was at its height when, early in 1758, Abercromby, who had succeeded Loudoun as Commander-in-Chief, decided upon a general advance. The plan of campaign was to invade Canada on two fronts-one from the south, via Lake Champlain, upon Montreal and the western portion of Canada, and the other from the east by sea, via Louisburg (Cape Breton) and the St. Lawrence River, upon Quebec on the eastern side.

Ticonderoga, 8th July, 1758

The 1st and 4th Battalions, under Bouquet and Haldimand, formed part of the main army in the western field of operations, and on the banks of Lake Champlain, at the failure of the attack on Ticonderoga, "at once a glory and a shame," the 4th Battalion and a portion of the 1st fought magnificently, losing 281 of all ranks killed and wounded. On 27th July, three weeks later, regardless of their losses, the Regiment furnished a part of the column under Bradstreet,4 of the 60th, which, after a forced march, captured Fort Frontenac on Lake Ontario by a coup de main on 27th August.

Fort Duquesne, 25th November, 1758

In November following, the 1st Battalion, employed on the western frontiers under General Forbes, played the leading part in the advance against Fort Duquesne on the Ohio, and led by Bouquet captured it from the French and Red Indians. This was a triumph over great physical difficulties. The solid value of the victory is thus summed up by the American historian Parkman: "It opened the great West to English enterprise, took from France half her savage allies, and relieved her western borders from the scourge of Indian Wars." Fort Duquesne, rechristened Fort Pitt, was garrisoned by a detachment of the 60th. It was destined to play an important role in the subsequent operations.

Louisburg, 6th July, 1758>

The 2nd and 3rd Battalions, under Lieutenant-Colonel Young and Major Augustine Prevost respectively, early in 1758 were ordered to join Generals Amherst and Wolfe in the eastern field of operations, and they took a prominent part in the capture of Louisburg, the great stronghold and sea base of the French at Cape Breton.

Quebec, 13th September, 1759

A still greater opportunity occurred 2nd and on 13th September at the decisive Battle of Quebec, where upon the 3rd Bns. Plains of Abraham the 2nd Battalion, whose light company covering the landing had been the first to scale the heights, protected the left during the battle against a very superior force of Red Indians and French which assailed the flank and rear of Wolfe's army under cover of dense bush and rocky ground. The grenadier companies of the 2nd and 3rd Battalions were included in the companies composing the Louisburg Grenadiers-a corps d'elite-to which was assigned the place of honour in the centre of the line. It was in close proximity to our grenadiers that the immortal Wolfe fell. It is said that it was Lieutenant John Brown, of the Royal Americans, who was the first to reach the dying hero. together with Lieutenant J. F. W. des Barnes,' his A.D.C., also of the Regiment. The 3rd Battalion played a no less important part by holding in check the enemy under Bougainville, who threatened the rear through the woods on the river bank.
The Regiment had thus a large share in this momentous victory a decisive step in the conquest of Canada.

Montreal, 1760

Amherst, who in 1759 had succeeded Abercromby 1st and in chief command of the army, led the main force in its advance to 4th Bns. Montreal, where, on 8th September, 1760, the 4th Battalion, a portion of the 1st and the grenadiers of the 2nd and 3rd, shared in the final surrender of the French army under the Marquis de Vaudreuil. By this surrender the supremacy in America finally passed to the British Crown.

Following up their successes in 1758 under General Forbes in the Ohio Valley, Bouquet and the 1st Battalion had by degrees captured or occupied the whole of the French posts west of the Alleghany Mountains, and they were accordingly chosen to hold the various forts established in the unexplored country south of the Great Lakes. A region embracing thousands of square miles of forest and lakes was thus consigned to the keeping of five or six hundred men, a vast responsibility for a single weak battalion garrisoning a few insignificant forts.