In 1848, the King's hand was forced by the revolution in Vienna and the five days' insurrection in Milan to declare war on Austria. At Milan the liberal committees prohibited the use of tobacco which was a monopoly of the Austrian Government. This led to a fracas which was the immediate cause of the insurrection, and the Austrians were driven out of Milan. Simultaneously with the movement in Lombardy there was a rising in Venice, the Austrians were driven out and a Republic was proclaimed. This proclamation was a great mistake, as it created distrust between Venice and Piedmont. The war with Austria was carried on with the utmost inefficiency by Charles Albert; he wasted every opportunity and gave himself up to fasting and prayer, and defeated, he had to submit to the terms of Radetzky to obtain an armistice which stipulated for the evacuation of Lombardy, the Duchies and Venetia.

The Piedmontese Constitution was proclaimed March 1848. It established two Chambers, gave a veto to the King, the prerogative of making peace or war, and to the Chambers the control of expenditure.

The armistice ended March 12, 1849, and hostilities were renewed, and the Italians were completely defeated at Novara. Charles Albert, who had struggled bravely but incompetently, abdicated in favour of his son Victor Emmanuel II. The new King signed the Treaty of Peace on March 26, 1849.

The war though disastrous was remarkable. For the first time an Italian army had fought under the Italian flag with the distinct purpose of establishing Italian unity.

The Venetian Assembly resolved that fusion with Piedmont was desirable.
The Assembly at Milan came to a similar resolution.

Nowhere was the armistice, signed by Victor Emmanuel after the battle of Novara, more unpopular than at Genoa. A deputation from the city waited on the King immediately after Novara, urging the continuation of the war. On March 27 a rumour that the Austrians were in the neighbourhood and intended to enter the city lit the fires of revolt which, fanned by the municipality and the clergy, broke out into open insurrection on the 29th. Arms were distributed and a Committee of Defence was formed composed of Constantino Rata, David Morchio, and Avezzana. It was stated that the movement was not republican in its nature, but sprang from a feeling of indignation with the King for having concluded what the Genoese thought a disgraceful peace with Austria.

The foregoing pages dealing with the history of Italy were necessary in order to show the position of affairs in that country at the time when the episode took place of which the following is the narrative. Three of Lord Hardwicke's letters remain giving an account of his action at Genoa. Simple, straightforward, clear, they give not only an admirable picture of the events of those exciting days, but also show the character of the man who, having to act on his own initiative, cast all feeling of self-interest aside and did what he conceived was his duty, with, as will be seen, the happiest results to the city of Genoa. This heroic action—because an act undertaken in a good cause without fear of consequences and at great personal risk is heroic—gained nothing for Lord Hardwicke in his profession; indeed it militated against his promotion in the service to which he was devoted; and though his application for active service in the Baltic during the Crimean War was refused on technical grounds, his action at Genoa was sedulously used by certain parties against him. All the more honour to the man who could risk so much for a great cause. He saved lives, he preserved from destruction Genoa with its palaces and treasures, and he did indirectly help forward the unity of Italy. In these days of quick communication, independence of action is almost impossible. The nervous man at home may spoil the bold man at sea; but it was not formerly so, and it has been by the initiative and on the responsibility of the man on the spot, that most of the great deeds have been done by our fellow-countrymen. If Nelson had not had a blind eye at Copenhagen the history of our country might have been different. If Lord Hardwicke had been in closer communication with Sir William Parker, Genoa might have been destroyed.

Lord Hardwicke had no sooner joined his ship in the Mediterranean than difficulties arose in Italy, and it fell to the duty of the fleet to protect the interests of Her Majesty's subjects living in the different ports. In February 1849, owing to the unrest in Tuscany and the Roman States, he was ordered to proceed in the Vengeance to Leghorn.

The following were his instructions from Admiral Sir William Parker:

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