The French needed to control the Adriatic to supply a growing army in the Illyrian Provinces, and consequently dispatched an invasion force in March 1811 consisting of six frigates, numerous smaller craft and a battalion of Italian soldiers.
The battle has been hailed as an important British victory, due to both the disparity between the forces and the signal raised by Hoste, a former subordinate of Horatio Nelson.
Hoste had raised the message "Remember Nelson" as the French bore down, and had then manoeuvred to drive Dubourdieu's flagship ashore and scatter his squadron in what has been described as "one of the most brilliant naval achievements of the war".
[4] In the Treaty of Tilsit, Russia had granted France control over the Septinsular Republic and withdrawn their own forces from the region, allowing Napoleon freedom of action in the Adriatic.
[6] Thus, the Treaty of Schönbrunn formalised Napoleon's control of almost the entire coastline of the Adriatic and, if unopposed, would allow him to transport troops and supplies to the Balkans.
[4] To disrupt the preparations of this army, the British Royal Navy, which had controlled most of the Mediterranean since the Battle of Trafalgar in 1805, seized the Dalmatian Island of Lissa in 1807 and used it as a base for raiding the coastal shipping of Italy and Illyria.
[7] To counter this, the French government started a major shipbuilding programme in the Italian seaports, particularly Venice, and despatched frigates of their own to protect their shipping.
Taking advantage of the temporary absence of Montagu, Dubourdieu assembled six frigates and numerous smaller craft and embarked over 500 Italian soldiers under Colonel Alexander Gifflenga.
[15] Dubourdieu planned to overwhelm Hoste's frigate squadron and then invade and capture the island, which would eradicate the British threat in the Adriatic for months to come.
[17] Turning west, the British squadron awaited the French approach in line ahead, sailing along the north coast of the island within half a mile of the shoreline.
Dubourdieu hoped to pass ahead of Active at the head of the British line and cross it further east with Danaé, which led the leeward division.
Dubourdieu possessed not only a significant advantage in ships but also in men, the Italian soldiers aboard giving him the opportunity to overwhelm the British crews if he could board their frigates successfully.
The French squadron held their fire, Dubourdieu gathering his troops and sailors into Favorite's bow in order to maximise the effect of his initial attack once his flagship came into contact with Amphion.
[2] Hoste was aware of Dubourdieu's intentions and the French advantage in numbers, and consequently ordered a large 5.5-inch (140 mm) howitzer on Amphion's deck triple-shotted until the cannon contained over 750 musket balls[19] Once Favorite was within a few yards of Amphion's stern, Hoste gave permission for the gun to be fired and the cannon's discharge instantly swept the bow of Favorite clear of the French and Italian boarding party.
[20] Favorite, which had lost almost its entire complement of officers, was unable to respond quickly enough to the manoeuvre and drove onto the rocky coastline in confusion, becoming a total wreck.
The strain of combat at this greater distance ruptured Volage's short-ranged carronades and left the ship much weakened, with only a single gun with which to engage the enemy.
[23][27] Active, the only British ship still in fighting condition, took up pursuit of the retreating enemy and at 12:30 caught the Corona in the channel between Lissa and the small island of Spalmadon.
[10] Although Favorite was wrecked, over 200 of her crew and soldier-passengers had reached the land and, having set fire to their ship, prepared to march on Port St. George under the leadership of Colonel Gifflenga.
[30] In surrendering and then escaping, the officers of Flore had breached an informal rule of naval conflict under which a ship that voluntarily struck its flag submitted to an opponent in order to prevent continued loss of life among its crew.
Flore had been able to pass unmolested through the British squadron only because she was recognised to have surrendered, and to abuse this custom in this way was considered, in the Royal Navy especially, to be a dishonourable act.
[22][34] Nearly four decades later the battle was also recognized in the issue of the clasp Lissa to the Naval General Service Medal, awarded to all British participants still living in 1847.
[36] British numerical superiority in the region was assured; when French reinforcements for the Adriatic departed Toulon on 25 March they were hunted down and driven back to France by Captain Robert Otway in HMS Ajax before they had even passed Corsica.