Meanwhile, the 2nd battalion embarked for Portugal for service in the Peninsular War in March 1809. It took part in the Second Battle of Porto in May 1809 and the Battle of Talavera in July 1809 before falling back to the Lines of Torres Vedras. It then fought at the Blockade of Almeida in April 1811, the Battle of Fuentes de Oñoro in May 1811 and the Battle of Almaraz in May 1812 as well as the Battle of Salamanca in July 1812, the Siege of Burgos in September 1812 and the Battle of Vitoria in June 1813. The battalion then pursued the French Army into France and fought at the Battle of the Pyrenees in July 1813, the Siege of San Sebastián in autumn 1813 and the Battle of Nivelle in November 1813 as well as the Battle of Toulouse in April 1814. The battalion returned home in July 1814. In August 1815 the 2nd battalion accompanied Napoleon into his exile on the island of Saint Helena. It returned home in September 1817 and was disbanded at Canterbury in October 1817.