The 2nd battalion deployed to the Peninsula to support General Sir Arthur Wellesley in June 1809 and fought at the Battle of Talavera in July 1809, the Battle of Bussaco in September 1810 and the Siege of Badajoz in May 1811 as well as the Battle of Albuera in May 1811 and the Battle of Arroyo dos Molinos in October 1811.