1835
1836
In November 1835, the regiment embarked at Liverpool for Ireland; it landed at Dublin, and was quartered in that city until October 1836, when it proceeded to Athlone.
1837
The regiment was again divided into six service and four depôt companies in the summer of 1837; and in August, the service companies embarked at Cork for the Mauritius, where they arrived in December, and landed at Port Louis.
1838
During the year 1838 the depôt companies were stationed at Kinsale and Tralee.
1839
On the augmentation of the army in August, 1839, the establishment of the Twelfth was increased to forty-seven serjeants, fourteen drummers, and eight hundred rank and file.
1840
1841
In May, 1839, the depôt companies embarked at Cork for Wales, and continued to be stationed at Newtown, Builth, and Brecon, until May, 1840, when they proceeded to Scotland and occupied the barracks at Paisley until May, 1841, when they returned to South Britain and were stationed at Sunderland.