Meanwhile, the 1st battalion deployed to the Peninsula in August 1811 and saw action at the Battle of Vitoria in June 1813 and across the Pyrenees, including the Battle of Sorauren in July 1813. It then pursued the French Army into France and fought at the Battle of Nivelle in November 1813, the Battle of the Nive in December 1813 and the Battle of Orthez in 1814 as well as the Battle of Toulouse in 1814. The battalion was then posted to North America for service in the War of 1812 and took part in the Battle of Plattsburgh in September 1814 before returning to England in July 1815. The regiment formed part of the Army of Occupation in France from 1815 to 1818 when it embarked for Ireland.