The regiment embarked for Portugal in 1808 for service in the Peninsular War. It saw action at the Battle of Vimeiro in August 1808 and the Battle of Corunna in January 1809 before being evacuated home later that month. The regiment returned to the Peninsula and fought at the Battle of Vitoria in June 1813, where it formed part of the "backbone" of the Duke of Wellington's forces. It then pursued the French Army into France at took part in the Battle of the Pyrenees in July 1813, the Battle of Nivelle in November 1813 and the Battle of Orthez in February 1814 as well the Battle of Toulouse in April 1814.