In 1726 the regiment moved to Menorca and in 1751 a royal warrant assigned numbers to the regiments of the line, and the unit became the 17th Regiment of Foot. The regiment embarked for Nova Scotia in 1757 for service in the French and Indian War; it fought at the siege of Louisbourg in June 1758, at the Battle of Toconderoga in July 1759. The following year, the regiment took part in the successful three pronged attack against Montréal in September. It also saw engagements in the West Indies in 1762 and during Pontiac's Rebellion before eventually returning to England in 1767.