The treaty of Amiens being concluded, the regiment sailed for Ireland in the summer of 1802, and after landing at Cork proceeded to Armagh.
1803
War was resumed in 1803, and in the summer of that year the regiment marched to Newry, where it was augmented to two battalions, from the army of reserve. Both battalions were completed to 1100 men each in less than two months, and in October the first battalion embarked from Ireland for Scotland; it landed at Greenock, and proceeded from thence to Edinburgh. It was followed to Scotland by the second battalion, which was stationed a short time at Stirling castle; but on the removal of the first battalion from Edinburgh to Haddington, the second battalion proceeded to Dunbar.
1804
The threat of invading England made by Napoleon Bonaparte, with the progress of the naval preparations on the coast of France, and the presence of a numerous French army at Boulogne, occasioned the regiment to be withdrawn from Scotland in the summer of 1804, and to proceed to the south of England, to be in readiness to repel the invaders, should they venture to land. On quitting Haddington, Lieut.-Colonel Montresor received a highly gratifying letter from the magistrates and clergy of that place, expressing their admiration of the peaceable and regular behaviour of the non-commissioned officers and soldiers of the first battalion during their stay at Haddington, and a tribute of public respect to the officers for their gentlemanly deportment towards the respectable inhabitants in the neighbourhood.
Both battalions landed at Ramsgate, and joined the troops encamped on Barham Downs. On the breaking up of the camp, the second battalion embarked for the island of Jersey.
1805
Towards the end of January, the first battalion embarked for the island of Jamaica, where it arrived in May.
1807
In 1807 the second battalion proceeded to the West Indies, and was stationed at the island of Curaçao.