We now find him at Vienna; but he only remained there a few months, for the Czar was desirous of acting with great vigour, and therefore despatched him, as Russian commissioner, to the Anglo-Russian and Neapolitan army, which was about to commence operations in the south of Europe under the influence of the noble Queen Caroline, so grossly slandered in the pamphlets issued by Napoleon. This army had hardly assembled at Naples, when the artillery of Austerlitz and the shouts of victory filled the air; and, as an immediate consequence, the peace of Presburg was signed. As this treaty separated Austria from the coalition, it occasioned the dissolution of the army of Naples; and Pozzo di Borgo returned to Vienna, and from thence to St. Petersburg, where great military events were in preparation. During the campaign crowned by the battle of Austerlitz, when Napoleon had advanced so boldly into the interior of Moravia, Prussia had hesitated whether she should join the coalition. It was impossible to deny her public conduct in that respect, and Napoleon had borne it in mind; this indecision, however, ceased after the battle of Austerlitz, and a twelvemonth afterwards the united force of the Russians and Prussians was drawn up together. Pozzo di Borgo was called upon to accompany the emperor in this campaign, and the Czar offered him rank in the army; such being the custom of Russia, where there is no advancement except by means of military rank: he therefore received the title of Colonel in the suite of the emperor, a post which attached him to the person of the sovereign. Being, for the fourth time, despatched to Vienna, after the battle of Jena, he strove to arouse Austria from the torpor into which the peace of Presburg had plunged her, but in vain; for the Austrian cabinet was then desirous of peace at any price. Colonel Pozzo received a commission to proceed to the Dardanelles, to treat for peace with the Turks, in conjunction with the English envoy; he was received on board the Russian fleet, under the orders of Admiral Siniavim, stationed at the entrance of the Dardanelles, and off the island of Tenedos; he was present in the admiral's ship at the battle of Mount Athos, between the Russian fleet and that of the sultan, and there received his first military decoration.