 It took part in the Battle of Roliça in August 1808 and the Battle of Vimeiro later that month before fighting under Lieutenant-General Sir John Moore at the Battle of Corunna in January 1809 and then taking part in the subsequent evacuation from the Peninsula.The regiment lost its territorial designation being renamed the 91st Regiment of Foot in April 1809.The 1st Battalion then took part in the disastrous Walcheren Campaign in autumn 1809.