The regiment returned to the Peninsula in March 1810 and fought under Wellington at Battle of Bussaco, Portugal in September 1810, the Battle of Sabugal in April 1811 and the Battle of Fuentes de Oñoro in May 1811. It also saw action at the siege of Ciudad Rodrigo in January 1812, the siege of Badajoz in March 1812 and the Battle of Salamanca in July 1812. It saw further combat at the siege of Burgos in September 1812, the Battle of Vitoria in June 1813 and the siege of San Sebastián in September 1813. The regiment pursued the French Army into France and fought them at the Battle of Nivelle in November 1813 and the Battle of the Nive in December 1813.