The 1st battalion went on to fight at the Siege of Badajoz in March 1812, the Battle of Salamanca in July 1812 and the Battle of Vitoria in June 1813. The regiment then pursued the French Army into France and fought at the Battle of the Pyrenees in July 1813, the Battle of Nivelle in November 1813, the Battle of Orthez in February 1814 and the Battle of Toulouse in April 1814. The regiment returned home later that year for service in Ireland.