Since then the immediate danger to Rome seemed to come rather from the North than from the West, the Triumvirs watched with much anxiety the hesitating attitude of Guerrazzi and the Tuscan Government. So eager had the leaders of the Roman Assembly been for a union between Tuscany and the Roman States that they had even offered to Montanelli and Guerrazzi places in the first Triumvirate, which had been formed before Mazzini and Saffi had been called to power. Guerrazzi, however, had refused to accept this offer; and, while declaring his desire for union with Rome, he professed his inability to find a means for effecting that union. Indeed, Guerrazzi held an almost impossible position. Though unable to make up his mind to accept a Republican Government, he was yet determined to resist any interference, either by Piedmontese or Austrians, in favour of the former Government of Tuscany. And while he still seemed to cherish Italian ideas, he felt that the defeat of Charles Albert had taken away the hopes for any satisfactory continuance of the War of Independence. Under these circumstances the champions of the restoration of the Grand Duke naturally gained ground in Tuscany. Guerrazzi, distrusted alike by Republicans and Royalists, was unable either to resist this movement, or to guide it according to his own theories; and on April 12 the Municipality of Florence took the matter out of the hands both of Guerrazzi and the Assembly, and decreed the recall of the Grand Duke.

This catastrophe, though a subject of regret, could scarcely have caused much surprise to the leaders of the Roman Republic. A feeling of far deeper pain must have been roused by the final failure of the earliest of all the struggles for liberty of this period. The coup d'état at Naples of May 15, 1848, though it had shattered the hopes of the Neapolitans, had only intensified the zeal of the Sicilians in their struggle against Ferdinand. As they had just deposed him from the throne, and proclaimed the Duke of Genoa as their King, they thought themselves safe against the restoration of Neapolitan rule; and the Ambassadors of France and England tried to persuade the King of Naples not to send an expedition to Sicily. He refused, however, to listen to these remonstrances; the expedition sailed; and, by his bombardment of Palermo, Ferdinand won for himself throughout Sicily the title of Il Re Bombardatore, which was quickly shortened into Bomba. Ruggiero Settimo, who had taken part in the struggles of 1812 and 1821, was placed at the head of the Sicilian Government, and Garibaldi was invited to come to defend the island. Garibaldi, however, did not arrive; and the chief defence of the island was entrusted to the Polish General Mieroslawski, who, having failed to save Posen from the hands of the Prussians, had become a kind of knight errant of liberty in other parts of Europe. He brought, however, but little good to the causes which he defended. He quarrelled with the Italian General Antonini, and was so often defeated, that the Sicilians began to fear treachery, and at last compelled him to resign his command. The struggle had, in fact, now become hopeless; and on April 17, 1849, the Sicilian Parliament decided to meet no longer. Then Ruggiero Settimo called his friends together, and declared that he was ready to undergo all his troubles again, if they decided to continue the contest. But they believed that the case was now desperate, and voted for peace. Then Settimo consulted the National Guard, but also in vain; and finding that any further efforts were useless, he resigned his Presidency, and left the island. The separateness of the Sicilian movement lessened, no doubt, in some degree the importance of this defeat; but the gallantry of their struggle had excited much sympathy in Rome; and their fall set free the Neapolitan forces for action against the Roman Republic.

This addition to the dangers which were harassing the Republic would not perhaps have been so formidable had not a new and more important enemy begun to show signs of hostility at the same period. The election of Louis Napoleon as President of the French Republic had been hailed with some satisfaction both in Venice and Rome; and, after the Roman Republic had been established, two envoys were sent to Paris, who reminded the President of the share he had taken in one of the insurrections against Gregory XVI. Louis Napoleon replied that the time of Gregory XVI. had gone by in Rome, and that his youth was also gone by. Both remarks were undoubtedly true, nor were they in themselves very alarming; but Ledru Rollin, one of the few Frenchmen who really sympathized with Italy, warned Mazzini that danger was coming; and the nature of the danger soon became apparent. On April 16 Odillon Barrot moved in the French Assembly a proposal for a vote of twelve hundred thousand francs for an expedition to Italy; an expedition, he said, which was not to restore the Pope; but to protect liberty and humanity. On April 20 General Oudinot took the command of the expedition, and told his followers that his object was to maintain the old legitimate French influence, and to protect the destinies of Italy from the predominance of the stranger, and of a party who were really in a minority. So kindly was the tone of the French Ministry towards the Romans, that Colonel Frapolli, one of the envoys of the Roman Republic, obtained the leave of the French President to organize a French Legion, which was to fight for the defence of Rome, and to be commanded by Pierre Buonaparte. But Pierre Buonaparte suddenly resigned his command; the prefect was ordered to hinder the embarkation of the Legion; and a large supply of muskets, which had been bought by the Roman Republic, were confiscated by the French Government. In the meantime Oudinot had set sail, and on April 24 he appeared before Civita Vecchia.

About the time when the French troops were landing, there arrived at the same place a very different force. The leader of this force was Luciano Manara, who had fought so gallantly in the "Five Days" of Milan, and who had afterwards been so hampered by Casati and Charles Albert in his attempt to rescue the Southern Tyrol from Austrian rule. He, like others, had been disappointed by the failure of Charles Albert's final war; but he had refused to join in the Genoese insurrection, which followed the defeat at Novara, and had preferred to set out with 8,000 men to help the Roman Republic. The difficulties thrown in the way of their march were, however, so great that only 600 remained with Manara by the time that he reached Civita Vecchia. Oudinot, with extraordinary impudence, disputed the right of the Lombards to interfere on behalf of Rome; and he even tried to persuade them that the cause of Rome was so distinct from that of Lombardy, that the Lombards could consistently join their forces with the French against Rome. Manara indignantly repelled the suggestion; and then Oudinot in vain attempted to exact a promise that the Lombard forces should not act against him until the 4th of May. Manara, having refused this further demand, Oudinot was forced to allow the Lombards to pass; and Manara marched to Rome to tell the Romans how the French Republic was preparing to defend the cause of "liberty and humanity."

In spite of this plain evidence of his intentions, Oudinot still attempted to play his double part; and, since his utterance about the government of a party in a minority had alarmed the inhabitants of Civita Vecchia, he authorised the Secretary of the Legation to declare the sympathy of the French for the Romans, and to assure the citizens of Civita Vecchia that the French Army had only come to defend them against the Austrians. Mannucci, the Governor of Civita Vecchia, had wished to oppose the first landing of the French; but he was overborne by the Chamber of Commerce and the Municipal Council, who were convinced that the French could not really intend to destroy the freedom which they so much professed to cherish. No sooner, however, had Oudinot effected a landing, than he announced that he would not protect the Anarchical Government of Rome, which had never been officially recognised. The Municipality became alarmed; and Oudinot again altered his tone, and declared that the French would respect the vote of the majority of the population, and did not desire to impose any special form of Government upon them. In spite of the warnings given by Oudinot's previous proclamation, the Municipal Council consented to admit him into the town; and, no sooner was he there, than he disarmed the battalion which was to have defended the town; and still further showed his zeal for the interests of "Liberty and humanity," by suppressing a printing office in Civita Vecchia, because it had recently printed an address in which the Papacy was condemned.

In the meantime the news had spread to Rome; and the Assembly were debating how they should receive Oudinot. So deep was the conviction of the reality of the French zeal for freedom, that Armellini actually suggested that Oudinot should be received as a friend. But, while the Assembly were debating, Mazzini entered the hall, and announced that Colonel le Blanc had confessed that the expedition was sent to restore the Papacy. Thereupon the Assembly voted that the Triumvirs should have power to resist force with force. But another difficulty arose; the officers of the National Guard declared that they did not believe their soldiers would fight. Thereupon Mazzini ordered that the battalions of the Guards should defile next morning in front of the Quirinal, where the Assembly were meeting; and, as the Guards passed, he put to them the question whether they were for peace or war. A loud shout of "Guerra, guerra!" answered his appeal; and the defence was at once resolved on.

In every district the heads of the people and the representatives of the Assembly were to organize the defence of every inch of the country. Barricades were thrown up; arms were to be given to all the people; while the municipality undertook to provide them with corn, meat, and other eatables. At the same time all foreigners, and particularly all Frenchmen living in Rome, were to be placed under the protection of the nation. Anyone who injured them was to be punished as having violated the honour of Rome. With regard to the actual soldiers to be used in the first defence of the city, they were arranged as follows:—the 1st brigade, commanded by Garibaldi, guarded the line outside the walls, which extends from the Porta Portese to the Porta San Pancrazio. The 2nd brigade, commanded by Colonel Masi, was drawn up before the Porta Cavalleggieri, the Vatican, and the Porta Angelica. The 3rd, under Colonel Savini, stood in reserve in the Piazza Navona. Colonel Galletti commanded the 4th, which was stationed in the Piazza Cesarini; while a reserve force under General Galletti, in which Manara and his Lombard volunteers were included, was held back for the present, to come up when needed. The whole of the forces were supervised by General Avezzana, who had organized the insurrection in Genoa after the defeat at Novara, and who now acted apparently both as Minister of War and Commander-in-Chief.

On April 29 Avezzana took his staff up to Monte Mario, from which point he could see the French army advancing from Civita Vecchia. As they marched along the road, the French saw everywhere a singular inscription painted upon the walls and posts. It ran as follows:—"Article 5 of the preamble of the French Constitution. The French Republic respects foreign nationalities as it intends to make its own respected. It does not undertake any war of conquest. It will never use its own forces against the liberty of any people." Whether as a kind of answer to this challenge, or in contempt of it, Oudinot announced to his troops that they came to liberate Rome from the factious party which had expelled the Pope, and which had answered his words of conciliation with ill-considered provocations.

It was at 11.30 a.m. on April 30 that the French and Roman armies first came into collision. Garibaldi advanced from Porta San Pancrazio to meet the French, who were entering the grounds of the Villa Pamfili, and who, hearing the bells of the city ring for the attack, supposed that an insurrection had broken out in favour of the Pope, and that they would have an easy victory. Garibaldi, however, repelled them, after a sharp fight, and made 300 prisoners. But the main attack of the French was in the meantime directed against the Porta Angelica. There one of the French captains had hoped to lead a column into Rome by a secret way near the Vatican. But a fire was poured on the advancing column from the Papal gardens, while the troops from Monte Mario attacked them in the rear. The battle lasted for four hours. The French captain Picarde managed at first to drive back the University battalion; but as he advanced, Colonel Arcioni at the head of a regiment of the Lombard exiles attacked him on one flank, and Galletti at the head of the National Guard on the other; finally Garibaldi, having disposed of his original opponents at the Villa Pamfili, charged the French force, and compelled them to lay down their arms.

Several acts of special valour marked this battle. One officer, named Montaldi, having been surrounded by the French, was beaten to his knees, and fought on with only a piece of his sword left. He had fought under Garibaldi at Monte Video, and was a Genoese by birth. Ugo Bassi[24] distinguished himself by riding about the field urging the Romans to battle. His horse was killed under him, and, as he was embracing it with tears, the French came up and took him prisoner. Garibaldi himself was wounded; but would not allow it to be known until the battle was over, when he sent privately for the doctor.