In July 1809, the regiment departed for the Netherlands and took part in the disastrous Walcheren Campaign: many of the men caught a disease called "Walcheren Fever", thought to be a combination of malaria and typhus, before returning home in September. In April 1810 the regiment was tasked with restoring order after the riots caused by protesters objecting to the incarceration of Sir Francis Burdett in the Tower of London. The regiment landed in Lisbon in August 1811 for service in the Peninsular War. It took part in the Siege of Ciudad Rodrigo in January 1812 and the Siege of Badajoz in March 1812 and then undertook successful charges at the Battle of Villagarcia in April 1812 and at the Battle of Salamanca in July 1812. The regiment next saw action at the Battle of Vitoria in June 1813 and then, having pursued the French Army into France, at the Battle of Toulouse in April 1814. The regiment returned home in July 1814.