Detachments from the regiment embarked as marines in early 1793 and were in combat on the third-rate HMS "Leviathan" at the capture of Toulon in December 1793, the attack on the Tour de Mortella in February 1794 and at the Glorious First of June in June 1794. They transferred to the third-rate HMS "Agamemnon" and served under Lord Nelson at the Battle of Genoa in March 1795, and then, after Nelson's transfer into the third-rate "Captain" in June 1796, with him at the Battle of Cape St Vincent in February 1797. At Cape St Vincent, Matthew Stevens, a soldier from the regiment, was the first to board the Spanish ship .