Siege of Porto Ferrajo The Siege of Porto Ferrajo was a French attempt to force the surrender of the Tuscan fortress town of Porto Ferrajo ( now Portoferraio ) on the island of Elba following the French occupation of mainland Tuscany in 1801 during the French Revolutionary Wars . The Tuscan garrison was heavily outnumbered , but received significant support from British Royal Navy forces who controlled the Mediterranean Sea and ensured that supplies reached the garrison and that French supply convoys were intercepted . The French began the siege with 1 , 500 men in May 1801 , later reinforced to more than 5 , 000 , but could not make an impression on the fortresses defences , instead seeking to starve the defenders into submission with the support of a squadron of French Navy frigates operating off the coast . The presence of a small British naval squadron in the region rendered this plan impractical and additional British reinforcements under Rear - Admiral Sir John Borlase Warren and Lieutenant Colonel George Airey strengthened the defenders to the point that sallies could be made against French offensive positions . The French subsequently lost all of the frigates sent to blockade the port to patrolling British warships in a series of one - sided engagements , giving the British local dominance that allowed them to maintain the fortress . Despite a number of naval actions and one significant land engagement , the siege dragged on inconclusively for the summer and early autumn of 1801 , and when the first articles of the Treaty of Amiens were signed in October , the town was still under Tuscan control , although the provisions of the final agreement , signed in March 1802 , granted the island to France . Invasion . In 1800 , French First Consul Napoleon Bonaparte advanced into Italy , achieving victories against the Austrian Empire at the battles of Marengo and Hohenlinden . After a year of warfare , the French and Austrians signed the Treaty of Lunéville on 9 February 1801 , which divided Northern Italy between the states and awarded the Grand Duchy of Tuscany to the French . Included in this division was the island of Elba in the Ligurian Sea off the Western Italian coast , which at that time was shared between Tuscany and the Kingdom of Naples . On 28 March 1801 , the Treaty of Florence was signed between Naples and France , officially turning the entirety of Elba over to French control , although it had not yet been surrendered by its Neapolitan and Tuscan commanders . Although the Ligurian Sea was by this stage largely French territorial waters , after the Royal Navy had destroyed the French Mediterranean Fleet at the Battle of the Nile off Egypt in 1798 , the British in fact controlled it and the whole Mediterranean Sea . By 1801 British bases at Gibraltar , Minorca and Malta allowed British naval forces to cruise throughout the sea largely unopposed ; their presence forced the remnants of the French fleet based at Toulon to make short journeys between French bases to avoid interception and capture . It was therefore not until a large French squadron under Rear - Admiral Honoré Ganteaume briefly asserted regional naval superiority that a French expeditionary force was able to secure Elba . They sailed from Piombino on 2 May 1801 with 1 , 500 men under General Jean Victor Tharreau , who landed unopposed at the Neapolitan town of Porto Longone . The invasion force rapidly spread across the island , meeting no resistance as the entire Neapolitan portion and almost all of the Tuscan region surrendered before them . Soon , all that remained in Tuscan hands was the fortress port town of Porto Ferrajo on the northern coast . This was a powerful defensive position , and the Tuscan commander Carlo de Fisson rejected Tharreau ' s demands that he surrender . The presence of two British frigates , HMS " Phoenix " and HMS " Mermaid " , off the port , buttressed de Fisson ' s position . Tharreau responded by laying siege to the fortress . The sudden departure of the two frigates in the face of Ganteaume ' s squadron , which bombarded the town on 6 May before being forced to retire following the outbreak of typhus on board the squadron , encouraged Tharreau . The small French frigate " Badine " subsequently blockaded Porto Ferrajo , with the intention of starving the defenders into surrender . Three more frigates " Carrère " , " Bravoure " and " Succes " , under the overall command of Captain Jacques - François - Ignace Bretel , soon arrived to augment " Badines blockade . Reinforcements . For the next three months the siege continued with little significant activity on either side , until the arrival at the end of July of General François Watrin with 5 , 000 additional men and instructions from General Joachim Murat to prosecute the siege more vigorously . However , the arrival off Porto Ferrajo on 1 August of a powerful British squadron under Rear - Admiral Sir John Borlase Warren in HMS " Renown " , whose ship chased " Bravoure " and " Succés " as far as Leghorn and reopened the sea passage into the port , almost immediately frustrated Watrin ' s ambitions . At the same time , a small British force under Captain Gordon landed at Porto Ferrajo to augment the Tuscan garrison . Then at 14 : 30 on 3 August , three of Warren ' s patrolling frigates , " Phoenix " under Captain Lawrence Halsted , under Captain Edward Leveson - Gower and under Captain Samuel James Ballard , discovered a sail off the western shore of Elba and gave chase . The ship was the 38 - gun " Carrère " under Captain Claude - Pascal Morel - Beaulieu , carrying 300 barrels of powder and escorting a convoy of small coastal vessels carrying military supplies from Porto Ercole to Porto Longone . Although " Carrère " turned away from the British pursuit and actively engaged the lead ship " Pomone " with her stern - chasers ( cannon mounted in the rear of the frigate ) , " Carrère " was too laden to escape her opponents . After a ten minute chase as " Pearl " cut off the route to Porto Longone and " Pomone " manoeuvered into a firing position , Captain Morel - Beaulieu surrendered . Losses on " Pomone " were limited to two killed and four wounded , two of whom subsequently died ; " Carrère " had suffered " tolerably severe " casualties in the engagement from a complement of 352 . The delay caused by the brief chase however had allowed the coastal ships to disperse and flee so that all of them avoided capture and some even reached Porto Longone . " Carrère " was a modern ship seized from the Republic of Venice after the Treaty of Campo Formio in 1797 . The Royal Navy took her into service under her existing name , although the Admiralty retired her from active service within a year . September . Although Warren departed soon afterwards leaving just a frigate squadron behind , the siege continued throughout August . French forces dominated Elba but were unable to make an impression on the walls of the fortress while Royal Navy forces controlled access to the island by sea , providing supplies for the defenders and denying them to the French . Halsted and " Phoenix " maintained a blockade of the port of Piombino on the Italian mainland , ensuring the interception of French supplies . At the end of August , Watrin learned that " Phoenix " was alone off the port and sent a message to Leghorn , where the remainder of the French squadron still lay at anchor , instructing them to attack the isolated British warship . " Succés " and " Bravoure " sailed on 31 August and arrived off Piombino at 06 : 30 on 2 September to discover that the frigates " Pomone " and , under Captain George Cockburn , had joined " Phoenix " . Halsted had received an intelligence report detailing Watrin ' s demand that the French ships sail from Leghorn and had summoned reinforcements . " Minerve " was the closest to the arriving French vessels and immediately gave chase , Cockburn signalling to Halsted and Leveson - Gower to join him . On sighting the British frigates Bretel turned back northwards towards Leghorn , but by 09 : 00 all three British warships were gaining on his small squadron . Unable to escape pursuit and with " Minerve " rapidly approaching , Bretel drove " Succés " ashore at Vada beach near Cecina in the hope of luring " Minerve " away from " Bravoure " , but Cockburn instead simply fired on the grounded vessel in passing before continuing towards the remaining ship while Bretel surrendered to " Pomone " . Captain Louis - Auguste Dordelin made desperate attempts to reach Leghorn before he was overtaken , but a northerly wind drove him back repeatedly and eventually he was forced to drive his frigate ashore under the Antignano battery , south of Leghorn harbour . Waves battered " Bravoure " , causing all three masts to fall overboard and the ship to became a total wreck . The small British force under Lieutenant William Kelly that boarded " Bravoure " was only able to bring off a few prisoners before heavy fire from batteries ashore forced them to quit her . Kelly ignored his instructions to burn " Bravoure " in order to spare the lives of the many French sailors still trapped on the ship . To the south , the British dragged " Succés " off the beach . The French had captured her in February 1801 , and after repairs she returned to service in the Royal Navy under her former name of . Counter - attack . With the French threat by sea eliminated , the Royal Navy was free to go on the offensive , and command of the Porto Ferrajo garrison was placed in the hands of Lieutenant Colonel George Airey while Warren had returned with his powerful squadron . Plans were then drawn up for a force of seamen , Royal Marines and Tuscan auxiliaries to launch an amphibious operation against the French batteries that overlooked the mouth of the harbour . The British assembled a landing party of 449 Marines and 240 seamen from " Renown " , HMS " Gibraltar " , HMS " Dragon " , HMS " Alexander " , HMS " Genereux " , HMS " Stately " , " Pomone " , " Pearl " and the brig HMS " Vincejo " , all under the command of Captain George Long of " Vincejo " and Captain John Chambers White of " Renown " . Approximately 1 , 000 Tuscan troops joined them . Landings took place on the morning of 14 September . The troops then moved inland against the batteries in two columns while " Dragon " and " Genereux " bombarded a fortified tower at Marciana . The attack began well as the British destroyed several batteries and took 55 prisoners of war , but soon the greater French numbers began to tell and the landing parties were pushed back to their beachheads in some confusion , having lost 32 killed , including Captain Long , 61 wounded and 105 missing , of which 15 dead , 33 wounded and 77 missing were British troops . General Watrin claimed this as a victory , inflating the numbers engaged and inaccurately claiming to have caused 1 , 200 casualties to the allies as well as having captured 200 men . Watrin also claimed to have dismasted a frigate and destroyed several smaller craft with fire from his batteries ; none of the British warships reported any damage . Although Warren departed the region soon afterwards with most of his squadron , Watrin was still unable to make an impression on the walls of Porto Ferrajo , and Airey held the town against the French for the last few weeks of the war until news arrived of the ceasefire that accompanied the provisional signing of the Treaty of Amiens on 1 October . In March 1802 under Article XI of the final terms of the Treaty , the British turned over the entire island to the French and Elba remained in French hands throughout the Napoleonic Wars .