The regiment was deployed to Afghanistan in 1838 and saw action at the Battle of Ghazni in July 1839 during the First Anglo-Afghan War. Renamed the 1st Bengal (European) Light Infantry in 1840, it fought at the Battle of Ferozeshah in December 1845 and the Battle of Sobraon in February 1846 during the First Anglo-Sikh War. It became the 1st Bengal European Fusiliers, also referred to in contemporary official papers, with inverted word ordering, as 1st European Bengal Fusiliers, in April 1846. It was deployed to the Province of Pegu in April 1852 during the Second Anglo-Burmese War.