At first, the unit was only a detachment of volunteers, raised in Sicily by Major General Sir John Stuart, once he had obtained permission from King Ferdinand I to recruit troops in Messina. This detachment, like several other foreign corps in British pay, was to be recruited from locals for the rank and file, with British officers. The detachment first experienced action within two months of its creation, when a small party at the Battle of Maida on 4 July 4, 1806. With two companies of the Royal Corsican Rangers, they were assigned to the light brigade commanded by Colonel James Kempt. After this victorious first mission the detachment returned to Messina. The following year, in March 1807, the Royal Sicilian Volunteers embarked for Constantinople in the mission led by General Alexander Mackenzie Fraser. This was later diverted to the Alexandria expedition of 1807. During this ill-fated mission the unit, now commanded by Colonel John Coape Sherbrooke, defended the Citadel of Qaitbay. After the end of the expedition, they returned to Messina and were allowed to resume recruiting troops. They were then sent to Malta to reinforce the garrison.
On 2 January 1809 the detachment of volunteers was raised to a proper regiment. At a ceremony at Floriana Barracks, Malta, they were presented with their regimental colours by General Sir Hildebrand Oakes, commander of the British forces in Malta. The Regiment remained in Malta, under Colonel Ronald C. Ferguson, until it was deployed to Spain to take part in Peninsular War in the expedition led by Lieutenant GeneralJohn Murray. In May 1813 the Sicilian Regiment took part in the Battle of Alicante. During 1814, the Sicilian Regiment took over the island of Ponza and then participated in the capture of the island of Kerkyra. During its stay in garrison at Malta, the regiment distinguished itself for the management of the terrible plague of that year, being highly praised for it by Governor Thomas Maitland. The following year the Regiment was to be called back in Britain, but Napoleon's escape from Elba prevented it and the Sicilian Regiment was called on to fight Joachim Murat in Italy. The regiment was finally disbanded on March 24, 1816, as were many other foreign regiments in the British Army, such as the King's German Legion.
Uniform
In 1810 the Sicilian Regiment wore the scarlet British infantry coat with dark green facings, collar and cuffs, white lace, stovepipe shako with bugle badge with a green plume, white breeches and black 3/4 gaiters. Officers' "metal" was gold.
