The three principal places in Corsica held by the French were St Fiorenzo (now St Florent) on the north, Bastia on the east, and Calvi on the west; and in that order Lord Hood decided to attack each place in succession. St Fiorenzo, the first to be dealt with, was situated at the head of a deep bay, studded on the western shore with detached forts, or towers, which, being constructed of solid masonry in a circular form, deflected the round-shots which struck them. The most formidable of these advanced works was the tower of Mortella,[16] and it was impossible to attack St Fiorenzo until these outworks had been carried. With the object, therefore, of reducing the Mortella Tower, Moore was ordered to land at a little distance away, and with the 51st (numbering 350) and a mixed force of soldiers and sailors (numbering another 350), and with two guns, to march inland and take the tower in rear, while the ships bombarded it from the sea. Moore's force landed on the night of the 7th February, and after a long march among the mountains reached, on the following evening, a point from which the enemy's fortifications could be clearly examined. Moore, who had reconnoitred them on his previous visit, was surprised to find that the French had strengthened their position considerably, and he came to the conclusion that his handful of men was quite insufficient to assail all the fortifications in front of St Fiorenzo. He therefore sent a despatch to General Dundas, and reported that to attack with any prospect of success would require all the General's available troops.
That day was spent in getting the guns into position and in a further reconnaissance, while two ships bombarded the Mortella redoubt, though without breaching it. The ships, moreover, were set on fire by the enemy's hot shot, and were forced to sheer off, with a loss of some sixty men. On the next day more guns were mounted on land, but although they did little damage to the solid tower, their fire made it impossible for the enemy to show himself or reply, and the French officer in command, seeing that he could no nothing, surrendered. The next outwork to be disposed of was the Convention redoubt, and this gave a good deal of trouble. Moore, who was still conducting operations on land, inspected the ground with General Dundas and Major Koehler, and discovered an excellent artillery position, from which it would be possible to batter the Convention. The difficulty was to get the guns up the steep, rocky hill, but, with the aid of a party of seamen with tackle, two 18-pounders and a howitzer were mounted within the next few days, and a mortar and some other guns were placed on a more accessible position, when the enemy's redoubt was subjected to a heavy cannonade for two days. Moore had now with him only the 51st, but on the 17th February the General gave him orders for the assault that night. The Royals were to join the 51st, and Moore was to assail the front of the redoubt, while the other British regiments and the Corsicans were to deliver simultaneous assaults on either flank.
Moore decided to attack in column of companies, the first company consisting of the grenadiers and light infantry[17] of the Royals, the second of the grenadiers of the 51st, the third of the light company of the 51st, then the battalion of the Royals (only sufficient to make five companies), then three companies of the 51st. The other five companies of the 51st followed in rear as a support; and in rear again came 130 sailors, under Captain Cooke, with entrenching tools.
At 8.30 P.M., by the light of a brilliant moon, Moore led the advance, which for a quarter of a mile could only be made in file. After a little he reached a spot open enough to form up the column; the enemy's piquets fired a few shots, as they realised what was taking place; and Moore immediately ordered his column to push on. When within fifty yards of the redoubt, they found themselves in a slight hollow, unexposed to the enemy's fire, and here Moore halted them for a few seconds preparatory to the final uphill rush. A moment later the Royals and the 51st leaped into the head of the work, and crossed bayonets with the Frenchmen, who stood their ground gallantly and fought with desperation. Eventually, however, the flank attacks pushed in and overwhelmed the defenders, though in the darkness it was difficult to distinguish friend from foe, and, to add to the confusion, the enemy holding the neighbouring redoubt of Fornali began to open with grape-shot upon the victorious British. But before midnight the latter had entrenched themselves, and within an hour it was learned that the French had abandoned Fornali.
Arrangements were now made for the attack on St Fiorenzo itself, but before they had been completed the enemy withdrew from the place and retired to the fortified town of Bastia, situated on the east coast of Corsica, and barely ten miles across the neck of the peninsula from St Fiorenzo.
The coast near Bastia was quite open, and the town was not fortified on that side; elsewhere, however, it was defended by four detached redoubts and a citadel placed on heights at a little distance inland. On February 23, Moore and General Dundas went across the mountains to reconnoitre the enemy's position, and on the following day the 51st and 69th advanced to within a mile and a quarter of the French piquets, who were heard throughout the night digging entrenchments for their further security on the ground which it was necessary for the British to occupy in order to capture Bastia from the land side. Becoming aware of this, General Dundas, in the morning, ordered Moore to withdraw his force, and, to the surprise and disappointment of every one, the withdrawal took place. Moore at first imagined that the General's idea was to perfect arrangements before delivering the assault, but after a while he discovered that, in spite of Lord Hood's constant request for co-operation from the land forces, General Dundas had refused to attempt the capture of the town with the small force under his command. This was a bitter discovery for Moore, who was longing to lead his regiment to the front, but he concealed his disappointment, as he considered that it would be "a species of mutiny for a subordinate officer to pass any opinion" on the action of his General.
Lord Hood, never on good terms with General Dundas, now brought matters to a head by sending a somewhat extraordinary letter, in which he said that upon the evacuation of Toulon the General's command had practically ended, and that he (Lord Hood) was in supreme command of both the fleet and the army. The General replied with calmness that, unless the Admiral could produce his commission from the King, neither he nor his officers would acknowledge his pretensions to the command of the land forces. But Lord Hood's letter probably had the result which he desired, for on the following day General Dundas, on the grounds of ill health, gave up the command, and having appointed the next senior officer, Colonel D'Aubant, a brigadier-general, and given him the temporary command of the army, left for England on the 11th March. D'Aubant proved himself a useless commander, and being averse to an assault on Bastia, threw cold water on every plan laid before him. In vain did Lord Hood urge the necessity for an attempt being made by the land forces; and, after holding several councils of war, he at length declared that he would take Bastia with the marines[18] and sailors. Already a month had been wasted in looking at the place—a month which gave the enemy leisure to perfect his fortifications and entrenchments. Almost another month passed before Bastia fell; and its fall was brought about not by assault or bombardment, but by starvation, resulting from Lord Hood's careful blockade from the sea and the Corsicans' watchfulness on land. There had been practically no fighting, and though Hood and Nelson dignified the operations with the name of siege, the army was never in position, and all that was undertaken by the ships was the maintenance of a strict blockade, and the landing of some guns and a fighting force under Nelson. The guns did little damage to the enemy or his works, thus wasting much valuable ammunition, and the force commanded by Nelson (consisting of 1183 soldiers acting as marines on board ship and 250 sailors) made no advance. On the 19th May Bastia was starved into surrender, and the 3500 men of the garrison gave up their arms to the British combined forces, which numbered no more than 3000 soldiers and sailors.
Attention was now directed to Calvi (on the west coast of Corsica), the only place of importance remaining in the possession of the French. It was known that they had been busy for some time victualling the place for a siege, and Lord Hood determined to operate before the garrison of Calvi could be further reinforced. Brigadier-General D'Aubant had gone home, on being relieved by General Charles Stuart, who had been sent out from England to succeed General Dundas, an appointment which met with the approval of every one and which gave confidence to the troops. The regiments in Corsica, though seven in number, were miserably weak, as they were required to furnish detachments for duty as marines on board the ships, and the climate had begun to tell on the health of the men. General Stuart's "army," available for operations against Calvi, consisted, therefore, of no more than 2300 men. These troops were conveyed in transports from Bastia to Mortella Bay, and, on the 19th June, after a further voyage, disembarked a few miles from Calvi, and marched inland to a camp on the high ground some three miles from the fortress. Colonel Moore was given the command of a special "corps of reserve," consisting of the "flank companies of the Royal Irish, 50th, and 51st, and the remains of the 2nd Battalion of the Royals," so the command of the 51st devolved, for the time being, on Major Pringle. Two outworks of considerable strength lay in front, i.e., on the land side, of Calvi—viz., the Fort of Mozzello and the fortified rock of Monteciesco. Batteries were immediately thrown up on commanding heights, about 500 yards from these outworks, and on the 7th July the enemy evacuated Monteciesco. The guns now turned on Mozzello, and for ten days endeavoured to make a practicable breach, the assailants suffering the whole time from the fire from Calvi itself and from some minor outworks, and Captain Nelson, who was present, unfortunately losing an eye, from splinters of stone being flung into his face by a round-shot striking the ground in front of him.
Before daylight on the morning of the 19th July, a breach having been effected in the walls of the Mozzello redoubt, the troops moved forward to the assault. Colonel Moore led the stormers, some of whom carried sandbags, and others ladders. Shot, hand-grenades, and live shells were hurtled down upon them by the defenders, but, nothing daunted, the grenadiers charged forward, and plying their bayonets with vigour, drove the Frenchmen out of the redoubt. In this desperate encounter Moore was wounded in the head by a splinter of a shell, but though knocked senseless for a moment, he continued to lead his men until he made certain that the place had been secured, and that entrenchments had been thrown up to cover the troops from the fire of the enemy's guns in Calvi.