The 1st Battalion went from Gibraltar to the Iberian Peninsula and was at Roliça and Vimeiro in 1808. The battalion took part in the Corunna, losing 400 men during the march. The men were then shipped to UK before taking part in the Walcheren Campaign before returning to the Peninsula in 1812. The regiment was present at Vitoria in 1813 and heavily engaged at the later action at Roncesvalles. At the Heights of Echalar, in August 1813, Wellington watched the regiment's attack against 6,000 French in rugged positions in the mountains and described it as "The most gallant and the finest thing he had ever witnessed". The regiment was held in reserve at the Nive and was again heavily engaged at Orthez in 1814.